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, 11], [-1, -20], [31, -50, -30, -29, -5], [17, -9, -31], [-23, 14, -40]]

[-220, 20, 6742500, 4743, 12880]