find the c . i . on a sum of rs . 10000 for 9 months at 20 % per annum , interest being compounded quarterly ?
"c . i . = 10000 ( 21 / 20 ) ^ 3 - 10000 = 1025 answer : c"
subtract(multiply(10000, multiply(add(const_1, divide(const_0_25, const_4)), add(const_1, divide(const_0_25, const_4)))), 10000)