No silly, it doesnt know what symbol you put your mouse over.
check it out
Every Mulitple of 9 is the same symbol-- 9,18,27,36,45...
take 11 for example and digits 1+1=2 11-2=9
21 2+1=3 21-3 =18
26 2+6=8 26-8=18
44 4+4=8 44-8=36
anyway keep going they all end up being a multiple of 9 and all multiples of 9 are the same symbol!!! Math baby!
Oh yeah and if it wasnt right, you did your MATH WRONG!!! hehe