input: 
  from typing import List
  
  def calculate_average_of_five_numbers(numbers: 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, 15, 25, 35, 45])
      25.0
      """
      return sum(numbers) / len(numbers)
  
output:     return sum(numbers) / len(numbers)