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: [[47, 5, 43, -31], [5, 14, -15, 14], [-14, -2, 19]]

[-313255, -14700, 532]