import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        long n = scanner.nextLong(), a = scanner.nextLong(), b = scanner.nextLong();
        if (n <= a + b || a == 0){
            System.out.println(Math.min(n, a));
        }
        else {
            if (n % (a+b) <= a){
                System.out.println(n/(a + b) * a + n % (a+b));
            }else
                System.out.println(n/(a + b) * a + 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