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, -42, -26], [8, -17, -19, -16], [4, 47, -38, 5], [-12, -4, 31, -47, -2], [-42, -29, 7, -35], [-43, -49, -41], [-15, 3]]