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.
[[-5, -28], [-29, 14, -19, 49], [8, 11, 23, 6], [-18, -35], [-4, 22, -9]]