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, -40, -18, -38], [48, 1, 11, 35, -23], [-25, 32, -21, 2]]

[848160, -425040, 33600]