input: def calculate_average_of_five_numbers(nums: List[float]) -> float:
      """
      Calculate the average of five numbers entered by a user.
  
      >>> calculate_average_of_five_numbers([10, 20, 30, 40, 50])
      30.0
      >>> calculate_average_of_five_numbers([5, 5, 5, 5, 5])
      5.0
      """
      return sum(nums) / len(nums)
output:     return sum(nums) / len(nums)