import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Scanner;

/**
 * TITLE : Count Balls
 * URL : https://atcoder.jp/contests/abc158/tasks/abc158_b
 */
public class Main {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String A = sc.next();
        String B = sc.next();
        BigDecimal NBC = new BigDecimal(N);
        BigDecimal ABC = new BigDecimal(A);
        BigDecimal BBC = new BigDecimal(B);

        BigDecimal answer = NBC.divide(ABC.add(BBC), 0, RoundingMode.DOWN).multiply(ABC);
        if (ABC.compareTo(NBC.remainder(ABC.add(BBC))) >= 0) {
            answer = answer.add(NBC.remainder(ABC.add(BBC)));
        } else {
            answer = answer.add(ABC);
        }
        System.out.println(answer.toString());
        sc.close();
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz