import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
    long  n=sc.nextLong();
        long a=sc.nextLong();
        long b=sc.nextLong();

        long so=n/(a+b);
        if(a==0){
            System.out.println('0');
            System.exit(0);
        }else if(n%(a+b)<=a){
            System.out.println(a*so + n%(a+b));
            System.exit(0);
        }else{
            System.out.print(a*so+a);
        }
    }
}
/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