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: [[20, 22], [40, 6, 13], [10, 33, -31, -21], [-11, -19]]

[440, 3120, 214830, 209]