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: [[21, 27, -31, 49], [9, 40, 37], [49, 47, -17, -4, -39], [-38, -49, -20, 43], [9, -8]]

[-861273, 13320, -6107556, -1601320, -72]