find the c . i . on a sum of rs . 10000 for 6 months at 20 % per annum , interest being compounded halfyearly ?
"c . i . = 10000 ( 11 / 10 ) ^ 1 - 10000 = 1000 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)