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: [[23, -29, 19], [46, -11], [-21, -3], [-6, -28, -28, -11, -15]]

[-12673, -506, 63, -776160]