diff --git a/calculator.py b/calculator.py
new file mode 100644
index 00000000..0e53ed6a
--- /dev/null
+++ b/calculator.py
@@ -0,0 +1,52 @@
+# Basic Calculator
+
+def add(x, y):
+    return x + y
+
+def subtract(x, y):
+    return x - y
+
+def multiply(x, y):
+    return x * y
+
+def divide(x, y):
+    if y == 0:
+        raise ValueError("Cannot divide by zero.")
+    return x / y
+
+def main():
+    print("Basic Calculator")
+    print("Select operation:")
+    print("1. Add")
+    print("2. Subtract")
+    print("3. Multiply")
+    print("4. Divide")
+
+    choice = input("Enter choice (1/2/3/4): ")
+
+    if choice not in ('1', '2', '3', '4'):
+        print("Invalid input")
+        return
+
+    try:
+        num1 = float(input("Enter first number: "))
+        num2 = float(input("Enter second number: "))
+    except ValueError:
+        print("Invalid number input")
+        return
+
+    if choice == '1':
+        print(f"{num1} + {num2} = {add(num1, num2)}")
+    elif choice == '2':
+        print(f"{num1} - {num2} = {subtract(num1, num2)}")
+    elif choice == '3':
+        print(f"{num1} * {num2} = {multiply(num1, num2)}")
+    elif choice == '4':
+        try:
+            result = divide(num1, num2)
+            print(f"{num1} / {num2} = {result}")
+        except ValueError as e:
+            print(e)
+
+if __name__ == "__main__":
+    main()
diff --git a/hello.py b/hello.py
new file mode 100644
index 00000000..75f38ced
--- /dev/null
+++ b/hello.py
@@ -0,0 +1,52 @@
+# Basic Calculator
+
+def add(x, y):
+    return x + y
+
+def subtract(x, y):
+    return x - y
+
+def multiply(x, y):
+    return x * y
+
+def divide(x, y):
+    if y == 0:
+        raise ValueError("Cannot divide by zero.")
+    return x / y
+
+def main():
+    print("Basic Calculator")
+    print("Select operation:")
+    print("1. Add")
+    print("2. Subtract")
+    print("3. Multiply")
+    print("4. Divide")
+
+    choice = input("Enter choice (1/2/3/4): ")
+
+    if choice not in ('1', '2', '3', '4'):
+        print("Invalid input")
+        return
+
+    try:
+        num1 = float(input("Enter first number: "))
+        num2 = float(input("Enter second number: "))
+    except ValueError:
+        print("Invalid number input")
+        return
+
+    if choice == '1':
+        print(f"{num1} + {num2} = {add(num1, num2)}")
+    elif choice == '2':
+        print(f"{num1} - {num2} = {subtract(num1, num2)}")
+    elif choice == '3':
+        print(f"{num1} * {num2} = {multiply(num1, num2)}")
+    elif choice == '4':
+        try:
+            result = divide(num1, num2)
+            print(f"{num1} / {num2} = {result}")
+        except ValueError as e:
+            print(e)
+
+if __name__ == "__main__":
+    main()
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