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, 20, 36, -20], [-9, -18], [26, -29, 3, -45, 24], [29, 46], [-13, 22, -18, -18]]