the amount of principal rs . 8000 at compound interest at the ratio of 5 % p . a . for 3 years is
"c . i = p ( 1 + r / 100 ) ^ n = 8000 ( 1 + 5 / 100 ) ^ 3 = 8000 ( 21 / 20 * 21 / 20 * 21 / 20 ) = rs 9261 answer : c"
multiply(8000, power(add(const_1, divide(5, const_100)), 3))