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.
[[4, 42], [-15, -27, -4, 13, -4], [-4, 42, -16, 49], [6, -5], [0, 48, 45], [-5, -45, 15, -4], [-43, 7], [-50, -38, 31]]