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.
[[-40, 23, -13, -20, 4], [30, -30], [-15, -28, -32, -32], [-7, -2]]