I did not understand this kata. If you look at the example in the instructions, the bottom right element is 0. Hence, when filled, should the last column not contribute 63 and not 64?

Also, what does 4*8 mean? Does each column of 8's (i.e. 4 8's) contribute 8?

Does each column of 4 6's contribute 6? If so, how much would a column of 2 6's (the top two elements being 6 and the bottom 2 elements being 0) contribute?

If there is a column, which reads, from top to bottom:
8
6
4
2
Is this possible? If so, how much does it contribute?

@thquinn