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: [[-12, 23, -47], [-12, 13, 3, 29, 41], [-42, 44, 39]]

[12972, -556452, -72072]