Definition: 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.
Input: [[42, -33, 25, 29], [3, -39, 12], [-18, -15, -47, 47]]

[-1004850, -1404, -596430]