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.
[[-18, 28, -38, 8, -31], [-49, -10, -25, 43], [41, 34], [8, -43, 15, -23], [39, -14, 17], [42, 30, 4, -40, -29], [-26, -47, 27, -15]]