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: [[21, -1], [-12, 30, 13], [-10, -29, -42, -47, 19], [36, -20], [12, 29, -5, 35]]

[-21, -4680, 10876740, -720, -60900]