input: from typing import List
  
  def calculate_average_of_five_numbers(nums: List[int]) -> 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
      >>> calculate_average_of_five_numbers([1, 2, 3, 4, 5])
      3.0
      >>> calculate_average_of_five_numbers([0, 100, 0, 100, 0])
      40.0
      >>> calculate_average_of_five_numbers([-10, -20, -30, -40, -50])
      -30.0
      """
      return sum(nums) / len(nums)
output:     return sum(nums) / len(nums)