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: [[12, -5, -20, -39, 26], [3, 25, -31, 17], [8, -21]]

[-1216800, -39525, -168]