Fix bug with get_factorial

app.py

@@ -37,14 +37,14 @@ def get_current_time_in_timezone(timezone: str) -> str:
 def get_factorial(number: int) -> str:
     """A tool that calculates the factorial of a given number.
     Args:
-        number: A string representing a the number for which factorial will be calculated.
+        number: A string representing a number for which factorial will be calculated.
     """
     if number < 1:
         return "0"
-    elif number > 40:
+    elif number > 20:
         return "Too large number"
     fact = 1
-    for i in range(1, n + 1):
+    for i in range(1, number + 1):
         fact *= i
     return str(fact)