input: def calculate_average() -> float:
      """ Calculate the average of five numbers entered by the user.
      >>> nums = [2, 4, 6, 8, 10]
      >>> average = sum(nums) / len(nums)
      >>> average == 6.0
      True
      """
      nums = []
      for i in range(5):
          nums.append(int(input("Please enter number: ")))
      average = sum(nums) / len(nums)
      return average
output:     nums = []
      for i in range(5):
          nums.append(int(input("Please enter number: ")))
      average = sum(nums) / len(nums)
      return average