import java.util.*;

public class Main{
    public static void main(String[]args){
        Scanner sc = new Scanner(System.in);
        long a=sc.nextLong();
        long b=sc.nextLong();
        long c=sc.nextLong();
        long d=0,e=0;
        d=a%(b+c);
        e=a/(b+c);
        if(d>=b)
        System.out.println(e*b+b);
        else
        System.out.println(e*b+d);
    }
}
/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