combinations of a length four sublist from four separate lists

Question

If I have four lists, [1,2,15,16], [6,7,10,11], [3,8,9,14], [4,5,12,13], how many ways can I get a combination of length four sublists taking one element from each list? For example: [1,6,3,4],[1,7,8,5],[1,10,9,12]

Answer 1

You have 4 choices for which element you choose from the first list, 4 choices for which element you choose from the second list, etc. So $4*4*4*4 = 256$ possible lists.