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: [[-23, -3], [35, -30, 31, 3, 21], [3, -42], [-29, 28, 42, 6, 1]]

[69, -2050650, -126, -204624]