diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 9363c30d..4df8add7 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,232 +1,228 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
+<LinearLayout
+    android:id="@+id/calculator_holder"
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:background="@color/dark_grey"
+    android:orientation="vertical"
     tools:context="calculator.simplemobiletools.com.simple_calculator.MainActivity">
 
+    <TextView
+        android:id="@+id/result"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="1.8"
+        android:gravity="center_vertical|right"
+        android:lines="1"
+        android:paddingLeft="@dimen/activity_margin"
+        android:paddingRight="@dimen/activity_margin"
+        android:text="0"
+        android:textColor="@android:color/white"
+        android:textSize="@dimen/display_text_size"/>
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="@color/dark_grey"
-        android:orientation="vertical">
+        android:layout_weight="2"
+        android:orientation="horizontal">
 
-        <TextView
-            android:id="@+id/result"
+        <Button
+            android:id="@+id/btn_modulo"
+            style="@style/MyButton"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:layout_weight="1.8"
-            android:gravity="center_vertical|right"
-            android:lines="1"
-            android:paddingLeft="@dimen/activity_margin"
-            android:paddingRight="@dimen/activity_margin"
-            android:text="0"
-            android:textColor="@android:color/white"
-            android:textSize="@dimen/display_text_size"/>
+            android:layout_weight="1"
+            android:text="%"/>
 
-        <LinearLayout
+        <Button
+            android:id="@+id/btn_power"
+            style="@style/MyButton"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:layout_weight="2"
-            android:orientation="horizontal">
+            android:layout_weight="1"
+            android:text="^"/>
 
-            <Button
-                android:id="@+id/btn_modulo"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="%"/>
-
-            <Button
-                android:id="@+id/btn_power"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="^"/>
-
-            <Button
-                android:id="@+id/btn_root"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="√"/>
-
-            <Button
-                android:id="@+id/btn_clear"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="C"/>
-
-            <Button
-                android:id="@+id/btn_reset"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="AC"
-                android:visibility="gone"/>
-        </LinearLayout>
-
-        <LinearLayout
+        <Button
+            android:id="@+id/btn_root"
+            style="@style/MyButton"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:layout_weight="2"
-            android:orientation="horizontal">
+            android:layout_weight="1"
+            android:text="√"/>
 
-            <Button
-                android:id="@+id/btn_7"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="7"/>
-
-            <Button
-                android:id="@+id/btn_8"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="8"/>
-
-            <Button
-                android:id="@+id/btn_9"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="9"/>
-
-            <Button
-                android:id="@+id/btn_divide"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="÷"/>
-        </LinearLayout>
-
-        <LinearLayout
+        <Button
+            android:id="@+id/btn_clear"
+            style="@style/MyButton"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:layout_weight="2"
-            android:orientation="horizontal">
+            android:layout_weight="1"
+            android:text="C"/>
 
-            <Button
-                android:id="@+id/btn_4"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="4"/>
-
-            <Button
-                android:id="@+id/btn_5"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="5"/>
-
-            <Button
-                android:id="@+id/btn_6"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="6"/>
-
-            <Button
-                android:id="@+id/btn_multiply"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="*"/>
-        </LinearLayout>
-
-        <LinearLayout
+        <Button
+            android:id="@+id/btn_reset"
+            style="@style/MyButton"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:layout_weight="2"
-            android:orientation="horizontal">
-
-            <Button
-                android:id="@+id/btn_1"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="1"/>
-
-            <Button
-                android:id="@+id/btn_2"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="2"/>
-
-            <Button
-                android:id="@+id/btn_3"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="3"/>
-
-            <Button
-                android:id="@+id/btn_minus"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="-"/>
-        </LinearLayout>
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="2"
-            android:orientation="horizontal">
-
-            <Button
-                android:id="@+id/btn_0"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="0"/>
-
-            <Button
-                android:id="@+id/btn_decimal"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="."/>
-
-            <Button
-                android:id="@+id/btn_equals"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="="/>
-
-            <Button
-                android:id="@+id/btn_plus"
-                style="@style/MyButton"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="1"
-                android:text="+"/>
-        </LinearLayout>
+            android:layout_weight="1"
+            android:text="AC"
+            android:visibility="gone"/>
     </LinearLayout>
-</RelativeLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/btn_7"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="7"/>
+
+        <Button
+            android:id="@+id/btn_8"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="8"/>
+
+        <Button
+            android:id="@+id/btn_9"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="9"/>
+
+        <Button
+            android:id="@+id/btn_divide"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="÷"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/btn_4"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="4"/>
+
+        <Button
+            android:id="@+id/btn_5"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="5"/>
+
+        <Button
+            android:id="@+id/btn_6"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="6"/>
+
+        <Button
+            android:id="@+id/btn_multiply"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="*"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/btn_1"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="1"/>
+
+        <Button
+            android:id="@+id/btn_2"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="2"/>
+
+        <Button
+            android:id="@+id/btn_3"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="3"/>
+
+        <Button
+            android:id="@+id/btn_minus"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="-"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/btn_0"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="0"/>
+
+        <Button
+            android:id="@+id/btn_decimal"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="."/>
+
+        <Button
+            android:id="@+id/btn_equals"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="="/>
+
+        <Button
+            android:id="@+id/btn_plus"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="+"/>
+    </LinearLayout>
+</LinearLayout>