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: [[-21, 22, -30], [-33, 20, 27, -36, -42], [28, -47, 42, -28]]

[13860, -26943840, 1547616]