import java.util.Scanner;

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

        long N = sc.nextLong();
        long A = sc.nextLong();
        long B = sc.nextLong();

        long remain = N % (A + B);
        if (remain>A) {
            remain=A;
        }
        long num= N / (A + B);

        System.out.println(num*A+remain);

        sc.close();

    }
}
/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