every year an amount increases by 1 / 6 th of itself . how much will it be after two years if its present value is rs . 64000 ?
"64000 * 7 / 6 * 7 / 6 = 87111 answer : a"
add(add(64000, multiply(divide(1, 6), 64000)), multiply(divide(1, 6), add(64000, multiply(divide(1, 6), 64000))))