Update app.py

app.py

@@ -16,7 +16,7 @@ def add_two_numbers(num1:float, num2:float)-> str: #it's import to specify the r
         num1: the first number
         num2: the second number
     """
-    return str(num1 + num2)
+    return num1 + num2
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: