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: [[40, -6], [-45, 43, -28, 50, 31], [1, 39, 24], [-20, -43, -7, -47]]

[-240, 83979000, 936, 282940]