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.
[[-21, -28, -20, -50], [-41, -41, 29, -14, -31], [31, -45, -47, -20, 32], [5, -16, 15], [-15, 11], [4, -16], [-17, 37], [8, -28, -4, 50], [17, 11, -37, -16]]