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.
[[-48, -9], [-33, -19], [-44, -38, -37, -10, -42], [39, 6, 30, -28], [37, -4, -19, 29]]