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.
[[4, 12, 11, -9, 47], [-21, 13, 6, -15, 17], [-28, 43, -39, 1, -45], [-39, 17, -8, 42, -15], [-40, -39, 15], [-42, -44], [-31, 41]]