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.
[[16, -25, -9], [10, -28, -31, -18, -33], [-29, 25, -41, -23, 21]]