a fellow borrowed a certain sum of money at 6 % per annum at simple interest and in 6 years the interest amounted to rs . 672 less than the sum lent . what was the sum lent ?
"p - 672 = ( p * 6 * 6 ) / 100 p = 1050 answer : a"
divide(672, subtract(const_1, divide(multiply(6, 6), const_100)))