Talk:Magic penetration/@comment-202.156.11.12-20120107142948/@comment-4087140-20120206001350

If you're referring to the "round(15.4 9 )round(15.5)" part, the important point is the overline above the 9, meaning that digit is repeated forever. 0.99999...0. 9, and as it so happens, 0. 9 1. So. Yeah.