input: from typing import List
  
  def calculate_average(numbers: List[float]) -> float:
      """Calculate the average of a list of five numbers entered by a user.
      >>> calculate_average([1, 2, 3, 4, 5])
      3.0
      >>> calculate_average([15, 20, 25, 30, 35])
      25.0
      """
output:     total = sum(numbers)
      average = total / len(numbers)
      return average