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.
[[-8, -2, 20, 39, -7], [-28, -35, -21, 28], [-49, 42, 46, 12, 15]]