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.
[[31, 8, 33, -13, 24], [23, -46, 23], [-39, 21], [-45, -31], [40, 39], [3, 19]]