Problem: the population of a village is 13400 . it increases annually at the rate of 21 % p . a . what will be its population after 2 years ?
Rationale: "formula : ( after = 100 denominator ago = 100 numerator ) 13400 × 121 / 100 × 121 / 100 = 19619 c"
annotated_formula: multiply(13400, power(add(const_1, divide(21, const_100)), 2))