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: [[-27, -40], [-13, 24, -5, 45], [14, 14, 16, -20, 31], [28, 21, 7]]

[1080, 70200, -1944320, 4116]