Problem: the difference between the compound interest compounded annually and simple interest for 2 years at 20 % per annum is rs . 432 . find the principal ?
Rationale: p = 432 ( 100 / 5 ) ^ 2 = > p = 10800 answer : e
annotated_formula: divide(432, subtract(power(add(divide(20, const_100), const_1), 2), add(multiply(divide(20, const_100), 2), const_1)))