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: [[8, -43], [-35, 12, -49], [-19, -6, -50, -7, 37], [39, 5, 13]]

[-344, 20580, 1476300, 2535]