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: [[-4, -5, 18, -21], [-15, 47, -40], [12, -13, -32, 44, 39], [34, 24, 11]]

[-7560, 28200, 8566272, 8976]