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, 50, -37], [5, -5, -26, -27, -4], [26, 1], [34, -17], [31, 32, -47]]