explain xkcd:Sandbox
Make changes, try things out, or just have fun with the wiki here! Just leave everything above the line alone, please.
>clear sandbox
X X K K CCCC DDDDD X X K K C C D D X X K K C D D X KK C D D X X K K C D D X X K K C C D D X X K K CCCC DDDDD
In sqrt: Result is not a number.