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.
[[-29, 5, -44, 9], [3, 1, -3], [-6, -31, -11, -24, -49], [6, 49, -31, 19]]