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: [[-3, 12, -35, -31], [-48, 37, -26, 17], [1, -18, 30], [48, 33, 37, -8]]

[-39060, 784992, -540, -468864]