You're at <x>, <y>, <z>
/2 = <x/2>, <y/2>, <z/2>
+1 = <x+1>, <y+1>, <z+1>
-25 = <x-25>, <y-25>, <z-25>
And x2 = <x*2>, <y*2>, <z*2>
Amazing, isn't it ?