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.
[[-23, -42, -44, 29], [-21, -15, 15, -11], [-39, 6, -10, 35, 18], [-15, 33, 23, 25]]