In this task you will be given a list of lists, of numbers. For every inner list, you should multiply every number in that list and put the results in your answer. The output should be a list of numbers with the same length as the number of the lists in the input list.
[[-43, -31, -38, -36, -28], [-34, 36, 27], [8, -21, 21, 20], [-40, -20, 18, -21]]