var input = require('fs').readFileSync('/dev/stdin', 'utf8');
var input_arr = input.split(' ');
var n = parseInt(input_arr[0]);
var b = parseInt(input_arr[1]);
var r = parseInt(input_arr[2]);


var less = n % (b + r);

var sum = b * parseInt(n / (b + r), 10);
if (less <= b) {
sum += less;
} else {
sum += b;
}

console.log('%d', sum);
