import java.util.*;

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 answer = 0;
        if (n % (a + b) == 0) {
            if (n < a+b) {
                if (n < a) {
                    answer = n;
                } else {
                    answer = a;
                }
            } else {
                answer = a * (n / (a + b));
            }
        } else if (n % (a + b) > a) {
            answer = a * (n / (a + b)) + a;
        } else {
            answer = a * (n / (a + b)) + (n % (a + b));
        }
        System.out.println(answer);
    }
}
/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