use bigger text size for Formula on tablets

app/src/main/res/layout/activity_main.xml

@@ -19,7 +19,7 @@
         android:maxLines="1"
         android:paddingLeft="@dimen/activity_margin"
         android:paddingRight="@dimen/activity_margin"
-        android:textSize="@dimen/actionbar_text_size"/>
+        android:textSize="@dimen/formula_text_size"/>
 
     <TextView
         android:id="@+id/result"
@@ -46,8 +46,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:layout_weight="1"
-            android:text="%"
-            android:textSize="@dimen/extra_big_text_size"/>
+            android:text="%"/>
 
         <Button
             android:id="@+id/btn_power"

app/src/main/res/values-sw600dp/dimens.xml

@@ -3,5 +3,6 @@
     <dimen name="min_widget_height">320dp</dimen>
 
     <dimen name="button_text_size">42sp</dimen>
+    <dimen name="formula_text_size">30sp</dimen>
     <dimen name="display_text_size">60sp</dimen>
 </resources>

app/src/main/res/values/dimens.xml

@@ -3,5 +3,6 @@
     <dimen name="min_widget_height">250dp</dimen>
 
     <dimen name="button_text_size">28sp</dimen>
+    <dimen name="formula_text_size">20sp</dimen>
     <dimen name="display_text_size">40sp</dimen>
 </resources>