Problem: find the principle on a certain sum of money at 5 % per annum for 2 2 / 5 years if the amount being rs . 1904 ?
Rationale: "1904 = p [ 1 + ( 5 * 12 / 5 ) / 100 ] p = 1700 . answer : a"
annotated_formula: divide(1904, add(divide(multiply(divide(add(multiply(2, 5), 2), 5), 5), const_100), const_1))