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.
[[4, 9, 9, -40], [10, 6], [2, 9, 12, -32], [7, -42, -26]]