input: Write a python function to calculate the square of each number in a list.
  assert calculate_square([1, 2, 3, 4]) == [1, 4, 9, 16]
  assert calculate_square([10, 20, 30]) == [100, 400, 900]
  assert calculate_square([0, -1, -2, -3]) == [0, 1, 4, 9]
output: def calculate_square(numbers):
      return [x**2 for x in numbers]