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: [[31, -37, 28, 32], [33, 45, 39, -36], [28, 15]]

[-1027712, -2084940, 420]