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.
[[-4, -8, -21, 16, -34], [16, 9, -28, -13, 48], [20, -15, -38], [19, -40, 19, -28], [-13, -20, 18, -6]]