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.
[[40, -13, -47, 2, 12], [22, 8, 42, -33], [1, 23, 12], [-24, -2, 47, -9, 20]]