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.
[[28, 47, 30, 35, 7], [-34, -8, -47, 31], [2, 4], [-23, 18, -10, -16]]