Update app.py

Updated the function to multiplication to multiply two integers

app.py

@@ -9,14 +9,14 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def mulitplication(arg1:str, arg2:int)-> str: #it's import to specify the return type
+def mulitplication(arg1:int, arg2:int)-> int: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
     """A tool that take two integer values as input and returns the results of thier product 
     Args:
         arg1: the first argument
         arg2: the second argument
     """
-        return arg1 * arg2
+    return arg1 * arg2
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: