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: [[15, 16], [50, -22, -4], [-31, -20, -40, -15, -22]]

[240, 4400, -8184000]