Use your own calculator!! Each IP only have 3 chances to ask a question here using the identity 'Guest' so seize your asking chance unless you want to register to be a member!!
\(\color{olive}{\dfrac{\sqrt{71.15}}{107.9-70.4}\\ = 0.224934558}\\ \color{orange}\text{according to my calculator}\)
#BlackLaTeXIsBoring.