a sum fetched total simple interest of 4016.25 at the rate of 13 p . c . p . a . in 5 years . what is the sum ?
"let the sums be p . now , 65 % of p = 4016.25 or , p = 6178.85 answer a"
divide(multiply(const_100, 4016.25), multiply(13, 5))