Update app.py

app.py

@@ -16,7 +16,7 @@ def my_calculator(num_1:int, num_2:int)-> int: #it's import to specify the retur
         num_1: An integer.
         num_2: An interger.
     """
-    try
+    try:
         return num_1*num_2
     except Exception as e:
         return "Error multiplying."