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: [[41, 41, -4, 31], [5, 48, -23], [4, -9, -14, -20]]

[-208444, -5520, -10080]