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.
[[-21, -8, -18, 5], [10, 18], [24, 37, -32, -50, -39], [-11, -13, -43]]