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.
[[14, -31, 23, -42], [-47, 9, -7, 15], [29, -17, 9], [9, -24, -43], [34, 35], [39, -30, 27, -32, 22], [-22, 40, 6, 32, 45], [-22, -42, 0], [21, -2, 15, -18]]