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.
[[10, -15, 9, -19, -35], [4, 40, 43], [15, -33, -14, -45], [50, 9, -4, 21, -21]]