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.
[[-4, 16, 49, 8, 29], [-20, -22, 15, 20], [10, 4], [-22, -50, -41, 46], [-30, -42, -49], [47, 45, 12], [41, 41, -17], [34, 31]]