input: def factorial_output(n: int) -> int:
      """ Computes the factorial of a given integer.
      >>> factorial_output(7)
      5040
      >>> factorial_output(5)
      120
      """
      if n <= 1:
          return 1
      else:
          return n * factorial_output(n - 1)
output:     if n <= 1:
          return 1
      else:
          return n * factorial_output(n - 1)