input: Write a function to calculate the average of five numbers entered by a user. Prompt the user to input five numbers, store them in a list, calculate the average, and print the result.
  assert calculate_average([10, 20, 30, 40, 50])==30.0
  assert calculate_average([5, 15, 25, 35, 45])==25.0
  assert calculate_average([0, 0, 0, 0, 0])==0.0
  assert calculate_average([-10, -20, -30, -40, -50])==-30.0
  assert calculate_average([1, 2, 3, 4, 5])==3.0
output: def calculate_average(numbers):
      return sum(numbers) / len(numbers)