Definition: 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.
Input: [[42, -32, -12, -13], [50, 3, -28, 47], [4, -12, 45, 2], [-50, 41, 30, 11], [15, 15], [31, -17, 49, 8]]

[-209664, -197400, -4320, -676500, 225, -206584]