import java.util.*;

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

        long N = sc.nextLong();
        long b = sc.nextLong();
        if (b == 0) {
            System.out.println(0);
            return;
        }
        long r = sc.nextLong();

        long x = N / (r + b);
        long ans = b * x;
        long mod = N % (r + b);
        System.out.println(ans + Math.min(mod, b));
    }
}

/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