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.
[[-20, -39, -40], [2, 44, -6, 2, 10], [-8, -4, -3], [5, 28, 0]]