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.
[[43, -15, 45], [-31, -39, 49, -47], [33, -28, 37, -26, -42], [3, 5]]