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: [[43, -31], [-10, 44, -38, -5, 9], [-28, -34, -32], [-8, 0, -31]]

[-1333, -752400, -30464, 0]