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.
[[-15, 25, -20, -22], [47, -3, 43], [40, 15, 48, -12, 28], [42, 29], [20, 0]]