the question is stated as such

"number 'e' is found almost accurately in a certain computer,and we can consider it as accurate.so each power of it also accurate. so we left to calculate the fracture ie

$\displaystyle e^x=e^{[x]}e^{x-[x]}$ "the question goes on

how is $\displaystyle e^x=e^{[x]}e^{x-[x]}$ a fracture

?

square cols represent the whole value