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, -22, 17], [29, -35, -12], [0, -19], [-1, -50], [29, 1, -16, -8, -50], [-2, -50, 36, -49], [-18, 45, -40], [-18, -32], [28, 15, 12, 9]]

[-15708, 12180, 0, 50, -185600, -176400, 32400, 576, 45360]