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: [[16, 32, 23, -16], [-26, -42, 50], [-30, -29, 38, -42, 40]]

[-188416, 54600, -55540800]