import java.util.*;
import java.lang.*;

public class Main {

    public static void main (String[] args) {
        Scanner in = new Scanner(System.in);
        long n = in.nextLong();
        long a = in.nextLong();
        long b = in.nextLong();

        long i = n / (a + b) * a;
        long j = Math.min(n % (a + b), a);
        System.out.println(i + j);
    }
}
/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