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: [[-38, -44, 40], [-18, 13, 47], [40, -8], [-12, 4]]

[66880, -10998, -320, -48]