import java.util.Scanner;

public class Main{

    public static void main(String[] args) {

        new Main().solve();
    }

    void solve(){

        long N, A, B;

        Scanner sc = new Scanner(System.in);
        N = sc.nextLong();
        A = sc.nextLong();
        B = sc.nextLong();
        sc.close();

        long numOfblue;

        numOfblue = N / (A + B);
        numOfblue = numOfblue * A;

        if(N % (A + B) >= A){
            numOfblue = numOfblue + A;
        }
        else{
            numOfblue = numOfblue + N % (A + B);
        }

        System.out.println(numOfblue);
    }

       
}
/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