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: [[45, 11, -35, 50], [-48, -44, 29, -44, -13], [-41, -20, -15, 33], [13, 48, -42], [-12, -21]]

[-866250, 35033856, -405900, -26208, 252]