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: [[47, 40], [41, 24, -29, 31], [0, 2, 49, -31]]

[1880, -884616, 0]