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, -9, 6], [12, 47, 4, 15, -35], [35, 25, -31]]

[-432, -1184400, -27125]