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, -2, 31, 6, 38], [34, 32], [-36, 42, -31, -8, -46]]

[-438216, 1088, 17248896]