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: [[-4, -11, -40], [38, 5, 15, 49], [-27, 14], [-50, 6, -15]]

[-1760, 139650, -378, 4500]