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: [[20, -34, -3, -37, -31], [36, 32], [-26, -42, 8, -2, 13], [1, -23, 0, 36, -28]]

[2339880, 1152, -227136, 0]