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: [[-31, -20], [16, 19, -2, -42, -8], [49, 47, 43]]

[620, -204288, 99029]