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.
[[-34, -40, -20], [29, 21], [-14, 46, 17, -16], [-12, 48, -32, 50]]