find the principle on a certain sum of money at 5 % per annum for 3 1 / 5 years if the amount being rs . 870 ?
"explanation : 870 = p [ 1 + ( 5 * 16 / 5 ) / 100 ] p = 750 answer : option c"
divide(870, add(divide(multiply(divide(add(multiply(3, 5), 3), 5), 5), const_100), const_1))