diff --git a/calculator.py b/calculator.py
new file mode 100644
index 00000000..ef944f44
--- /dev/null
+++ b/calculator.py
@@ -0,0 +1,14 @@
+class Calculator:
+    def add(self, a, b):
+        return a + b
+
+    def subtract(self, a, b):
+        return a - b
+
+    def multiply(self, a, b):
+        return a * b
+
+    def divide(self, a, b):
+        if b == 0:
+            raise ValueError("Cannot divide by zero.")
+        return a / b
\ No newline at end of file
diff --git a/hello.py b/hello.py
new file mode 100644
index 00000000..e69de29b