Update app.py

app.py

@@ -51,9 +51,9 @@ def calculator(num_1: float, num_2: float, sign: str) -> float|str:
         if num_2 != 0:
             return num_1/num_2
         else:
-            return 'You can't make a division by 0!'
+            return "You can't make a division by 0!"
     else:
-        return 'Sign not recognized!'
+        return "Sign not recognized!"
     
 
 final_answer = FinalAnswerTool()