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: [[-8, -42, 35, -19, 21], [-8, -8], [-11, 29, -6, -34], [-19, 16]]

[-4692240, 64, -65076, -304]