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.
[[-49, -35, -25, -36], [35, -37, -25, 42, -9], [29, 50, -46, -20], [-45, 31, 8]]