Apply readability only to selected fragments problem

[kmlkz]

as the tittle says, i don't like how RR remove things when i selected Apply readability only to selected fragments, like when i visit this page : http://www.themathpage.com/arith/mental-arithmetic-multiplication.htm

when i tried to select it from top to bottom ( Full page ) it only takes from the paragraph :
"Since it is true in arithmetic that we may multiply by decomposing the multiplier, the right-hand distributive law of algebra may be applied to arithmetic"

How do i let RR to select the full page? instead of ommiting vital contents, as i want it to print.

Hope you can help :D