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: [[40, -21, -47, -22], [-47, 14, -2, 47], [-24, 29, 19, 18, -19], [29, -3, 47]]

[-868560, 61852, 4522608, -4089]