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, 45, -15], [36, 12, -25], [19, 38, -18, 31], [-25, -27, 42, -4], [-40, 16, 9]]