import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long N = Long.parseLong(sc.next());
        long A = Long.parseLong(sc.next());
        long B = Long.parseLong(sc.next());
        long C = A + B;
        // Nを指定した場合のあまり
        long L = N % C;
        // 計算用
        long target = A * (N / C) + Math.min(L, A);
        // 出力
        System.out.println(target);
    }
}
/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