diff --git a/src/calculator.py b/src/calculator.py
new file mode 100644
index 0000000000000000000000000000000000000000..f83774defbdad19d621f4f24944a4a5850065933
--- /dev/null
+++ b/src/calculator.py
@@ -0,0 +1,14 @@
+
+def add(x,y):
+    return x+y
+
+def substract(x,y):
+    return x-y
+
+def multiply(x,y):
+    return x*y
+
+def divide(x,y):
+    if y == 0:
+        raise ValueError('Can not divide by zero!')
+    return x/y