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.
[[-7, 4, 31, 48, -25], [21, -40, -16, 41], [-26, 9], [-16, 31]]