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.
[[-45, -18, -38, -31, 1], [7, 50, -5, 41], [-15, -47, 4], [37, -22], [25, 27, 41], [38, 50, 42], [-13, -2, -23, -28]]