android-calculatorpp/calculatorpp/res/layout-land/main_first_pane.xml

<?xml version="1.0" encoding="utf-8"?>

<!--
  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
  ~ For more information, please, contact se.solovyev@gmail.com
  ~ or visit http://se.solovyev.org
  -->
<LinearLayout
        xmlns:a="http://schemas.android.com/apk/res/android"
        a:layout_width="match_parent"
        a:layout_height="match_parent"
        a:orientation="vertical"
        a:layout_gravity="center">

    <LinearLayout a:id="@+id/editorContainer"
                  a:layout_weight="2"
                  a:layout_width="match_parent"
                  a:layout_height="0dp"/>

    <LinearLayout a:layout_weight="1"
                  a:layout_width="match_parent"
                  a:layout_height="0dp">

        <include layout="@layout/calc_left_button"
                 a:layout_margin="@dimen/button_margin"
                 a:layout_width="0dp"
                 a:layout_height="match_parent"
                 a:layout_weight="1"/>

        <include layout="@layout/calc_erase_button"
                 a:layout_margin="@dimen/button_margin"
                 a:layout_width="0dp"
                 a:layout_height="match_parent"
                 a:layout_weight="1"/>

        <LinearLayout a:id="@+id/displayContainer"
                      a:layout_height="match_parent"
                      a:layout_width="0dp"
                      a:layout_weight="4"
                      a:layout_margin="@dimen/display_margin_land"/>

        <include layout="@layout/calc_clear_button"
                 a:layout_margin="@dimen/button_margin"
                 a:layout_width="0dp"
                 a:layout_height="match_parent"
                 a:layout_weight="1"/>

        <include layout="@layout/calc_right_button"
                 a:layout_margin="@dimen/button_margin"
                 a:layout_width="0dp"
                 a:layout_height="match_parent"
                 a:layout_weight="1"/>

    </LinearLayout>

    <LinearLayout a:id="@+id/keyboardContainer"
                  a:layout_weight="3"
                  a:layout_width="match_parent"
                  a:layout_height="0dp"/>


</LinearLayout>