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: [[2, 10, 18, 21, -17], [13, -10, 39, -37], [-27, 9], [9, -15, -29]]

[-128520, 187590, -243, 3915]