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.
[[13, 31, -35, 39, 2], [-32, -17], [16, 13], [3, 10, -19, -37]]