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: [[14, -49], [-10, 11], [-33, -29, 9, -20]]

[-686, -110, -172260]