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: [[8, -15, -42, -31], [-1, -9], [50, -33, 33, -4, 27]]

[-156240, 9, 5880600]