^^^ O_G's figures have been based upon 30cm tiles, rather than 33cm ones.
I don't know what Sandy's planning to do with all the spare tiles he'll have left over ;-)
8' x 8' = 2.44m x 2.44m.
So you need a grid of 7½ tiles by 7½ tiles (with each nominal 'half' tile actually being trimmed to just a bit under a half). So that's 56¼ tiles, meaning that you'd need to purchase 57 tiles (or whatever number of packs you'd need to ensure that you'd got that quantity).
As JTH's illustration shows, you lay a 7 x 7 grid of tiles (using up 49 of them). You then cut 7 tiles into nominal 'halves', to fill round all of the edges except for the top left-hand corner. You need just a (nominal) quarter of the remaining tile to fill that tiny gap.