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, -35, -42, -41], [37, 38, 50, 48], [-40, -21, -7, -29, 17]]

[723240, 3374400, 2898840]