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, 8, -16, 10, -12], [-34, -39, -31, 10, 3]]

[-645120, -1233180]