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: [[42, 10, -45], [-42, 30, 47], [15, -42, -37], [-7, 43, -10]]

[-18900, -59220, 23310, 3010]