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.
[[-28, 22], [-24, -31, -1], [4, 3], [-47, -40, 0, -29, 18], [-50, -21, -5]]