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


public class Main {
    public static void main(String[] args) throws java.lang.Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader((System.in)));
        StringTokenizer s = new StringTokenizer(br.readLine());
        long n = Long.parseLong(s.nextToken());
        long blue = Long.parseLong(s.nextToken());
        long red = Long.parseLong(s.nextToken());
        long periods = n / (blue + red);
        long totalBlue = blue * periods;
        System.out.println(totalBlue + Math.min(n % (blue + red), blue));
    }
}
/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