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: [[-31, -12, -28, -50], [19, 12, -7], [38, -13], [-30, 24, -35, 37], [26, -22, -8], [-24, -10, -29], [-10, 24, 20, -28], [-36, -36, 0], [19, 24]]

[520800, -1596, -494, 932400, 4576, -6960, 134400, 0, 456]