Mcalc 1.0 (Minecraft calculator)

The Mcalc 1.0 is a calculator, which can calculate with numbers up to 255 (2x 8 bits).

It can do adding, subtracting, multiplication and division.

The calculator core (part which does the actual calculation) is as far as I know,
the smallest, for what is does, with a size of 71x41x19.

If you know a smaller one, please message me either on:
Youtube: https://www.youtube.com/user/SnakeVenomsMC
Twitter: https://twitter.com/SnakeVenoms
Planetminecraft: You are on it, just leave a comment :)
Minecraft forums: http://www.minecraftforum.net/user/1672326-snake-venom/

Additional Notes

Only works with Minecraft 1.6.2+

The speed of addition and substraction is only limited by the redstone speed.
Multiplication takes about 20 seconds and division takes ~2:30 min.

Check out Ammorth for his 2 wide adder: http://www.youtube.com/watch?v=UFSAPe761QY