please..

app.py

@@ -15,7 +15,7 @@ def my_custom_tool(number1:int, number2:int)-> str:
         number2: the second argument
     """
     greatest_divisor = math.gcd(number1,number2)
-        return f"The greatest common divisor between {number1} and {number2} is {greatest_divisor}."
+    return f"The greatest common divisor between {number1} and {number2} is {greatest_divisor}."
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: