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: [[-12, 25], [28, -30], [-20, 11, 4], [-12, 12]]

[-300, -840, -880, -144]