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.
[[48, 50, 13, -30], [-45, 17], [-17, 11], [7, -3, 8, -23], [26, 39, 21]]