import java.util.Scanner;
public class Main{
    public static void main(String[]args){
        Scanner scan = new Scanner(System.in);
        long n,a,b,tmp;
        n=scan.nextLong();
        a=scan.nextLong();
        b=scan.nextLong();
        tmp=n/(a+b);
        tmp*=a;
        if(n%(a+b)<a) tmp+=n%(a+b);
        else tmp+=a;
        System.out.println(tmp);
    }
}
/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