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: [[23, 39, -39, 43], [47, -16, -30, -28, -9], [-39, 19], [-31, -46]]

[-1504269, 5685120, -741, 1426]