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.
[[8, 31, -42], [0, 13], [-44, -23], [-34, 8], [-37, -50, 13, 24, 25], [-35, 25, -40], [-7, 38, 17, 20]]