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.
[[-42, 23, 32, 26], [38, 44, 37, 36, -50], [-17, 37], [-23, 3, 39, -39, 31]]