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: [[-12, 35, -31, -5], [37, -14], [9, 19, 47]]

[-65100, -518, 8037]