Definition: 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.
Input: [[9, -31, 11], [3, 37, -14, 3, -3], [-12, -15, 40, -12, 9]]

[-3069, 13986, -777600]