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: [[28, -21, -33, 16], [25, 1, -18], [-15, 41, 26, -49, -12], [23, -44, 25, 50, 31], [-49, -16, -20, -32, 7]]

[310464, -450, -9402120, -39215000, 3512320]