input: Write a function that takes a list of numbers ranging from 1 to 8 and prints the cubic values of each number in the list.
  assert calc_cubes([1, 2, 3, 4, 5, 6, 7, 8])== [1, 8, 27, 64, 125, 216, 343, 512]
  assert calc_cubes([])== []
  assert calc_cubes([1, 3, 5, 7])== [1, 27, 125, 343]
output: def calc_cubes(numbers):
      return [num ** 3 for num in numbers]