input: Write a python function to multiply elements of two lists of the same length element-wise.
  assert multiply_lists([1, 2, 3], [4, 5, 6]) == [4, 10, 18]
  assert multiply_lists([2, 4, 6], [3, 3, 3]) == [6, 12, 18]
  assert multiply_lists([0, 1, 2], [10, 20, 30]) == [0, 20, 60]
output: def multiply_lists(list1, list2):
      return [a * b for a, b in zip(list1, list2)]