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.
[[39, -42, -28], [47, 29, 14, 7], [34, -20, -48, 13], [43, 25], [26, 29]]