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: [[-41, -40], [-31, 11, -22, -21], [32, -11], [-15, -14, -6, -28]]

[1640, -157542, -352, 35280]