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, -40, -20, 31], [40, -33, 16, -35, -17], [-43, 48, -36, 50, -37], [40, 6, -36, -12, 34], [12, 18, -32, 36, 15], [-20, -33, 49, 16], [46, -40, 6, -7, -11], [-47, 13, -4, -17, 21]]

[-768800, -12566400, -137462400, 3525120, -3732480, 517440, -850080, -872508]