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: [[-20, 50, -49, -10], [3, 1, 48], [-9, -31, -28, 1], [-39, -32]]

[-490000, 144, -7812, 1248]