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.
[[31, -30, 33, -5], [-23, 8, -35, -20], [47, -7, 43, 0, 48], [-46, -35], [-24, -39, 14, -31], [13, -14, 27], [-15, -13, 6, 39]]