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: [[18, -4], [-15, 28, 49], [22, 25, 11, 47], [-43, -17, 17, 49]]

[-72, -20580, 284350, 608923]