diff --git a/src/calculator.py b/src/calculator.py
new file mode 100644
index 0000000..c8197bb
--- /dev/null
+++ b/src/calculator.py
@@ -0,0 +1,5 @@
+while True:
+    try:
+        print(f"{eval(input()):.2f}")
+    except:
+        break