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.
[[3, 35, -1, -28], [-31, 4, 30], [20, 15, -40, 24], [-36, -31, -8, 2]]