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, 23, -47], [-21, 30, 48, -50, 30], [20, -6, -29], [-22, -1, -5]]

[-33511, 45360000, 3480, -110]