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());
        sc.close();
        //青いボールの合計個数
        long sumA = N / (A + B) * A;
        long remain = N % (A + B);

        if (remain < A) {
            sumA += remain;
        } else {
            sumA += A;
        }
        System.out.println(sumA);
    }

}
/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