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.
[[31, -42, -11, -50, -10], [47, -14, 48, -7, -46], [3, 36, 35, 48, -30], [23, -50], [9, -22, 27, 0, 3], [-29, -49, -21, -7, 12]]