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.
[[-18, 22, 20, 1], [35, 9, -26], [5, 42], [-3, 28, 11], [10, -46, 25, -15]]