import java.math.BigInteger;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger N = BigInteger.valueOf(Long.parseLong(sc.next()));
        BigInteger A = BigInteger.valueOf(Long.parseLong(sc.next()));
        BigInteger B = BigInteger.valueOf(Long.parseLong(sc.next()));
        BigInteger num = N.divide(A.add(B));
        BigInteger rem = N.mod(A.add(B));
        if(A.compareTo(rem) == -1){
            System.out.println(num.multiply(A).add(A));
        }else{
            System.out.println(num.multiply(A).add(rem));
        }
    }
}
/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