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.
[[22, 9, 2, -37, 47], [-11, -10, -1], [42, 49, -31, -7, 38], [30, 35]]