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.
[[4, -21], [20, -19, 49, 10, 8], [19, -17, 8, -3], [26, 42, 38]]