diff --git a/calc/calc1.xml b/calc/calc1.xml
new file mode 100644
index 0000000000000000000000000000000000000000..bed00d55859d5e5fbc348eff1e448089161f0a3c
--- /dev/null
+++ b/calc/calc1.xml
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diff --git a/calc/calc2.xml b/calc/calc2.xml
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index 0000000000000000000000000000000000000000..98572adb92e8a95c709317366c0368ee431dede1
--- /dev/null
+++ b/calc/calc2.xml
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diff --git a/calc/calc3.xml b/calc/calc3.xml
new file mode 100644
index 0000000000000000000000000000000000000000..1b2ee149f84f260724e055ba0d71be20e07644ca
--- /dev/null
+++ b/calc/calc3.xml
@@ -0,0 +1,274 @@
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diff --git a/calc/calc4.xml b/calc/calc4.xml
new file mode 100644
index 0000000000000000000000000000000000000000..20ce114305ade038d4bc6509cf1d1110a1570973
--- /dev/null
+++ b/calc/calc4.xml
@@ -0,0 +1,234 @@
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diff --git a/calc/main_active.java b/calc/main_active.java
new file mode 100644
index 0000000000000000000000000000000000000000..a0fea5e73291c9b430ec440e454ff79db8e18f8c
--- /dev/null
+++ b/calc/main_active.java
@@ -0,0 +1,15 @@
+package com.example.helloworld;
+
+import android.os.Bundle;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class MainActivity extends AppCompatActivity {
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setContentView(R.layout.calculator2);
+
+ }
+}
\ No newline at end of file