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, 13, -13], [-48, -40, 40], [-49, -42], [9, -5, -48, -18]]

[-7098, 76800, 2058, -38880]