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.
[[41, 16, -15, -48, -31], [18, 13, -2, 18, 10], [-48, 38, -45], [41, 4, -13, 28, -30]]