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.
[[38, -18, -48], [32, -9, 19, -44], [-2, 48], [-20, -46, -12, 38, -12]]