input: Write a python function to multiply elements of two lists of the same length element-wise using list comprehensions.
  assert multiply_lists([1, 2, 3, 4], [5, 6, 7, 8]) == [5, 12, 21, 32]
  assert multiply_lists([2, 3, 4], [5, 6, 7]) == [10, 18, 28]
  assert multiply_lists([1, 1, 1, 1], [1, 1, 1, 1]) == [1, 1, 1, 1]
output: def multiply_lists(list1, list2):
      return [a * b for a, b in zip(list1, list2)]