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.
[[-26, 3, -15, -26], [48, -46, -31], [-32, -25, -25, -2], [-21, 28, 31, -38, -47]]