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, -44, -35], [33, -37, 49, 41], [-15, 21, 41, 20]]

[-64680, -2452989, -258300]