
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String[] arr = reader.readLine().split(" ");
        long N = Long.parseLong(arr[0]);
        long A = Long.parseLong(arr[1]);
        long B = Long.parseLong(arr[2]);
        long div = N / (A + B);
        long mod = N % (A + B);
        System.out.println(A * div + Math.min(A, mod));
    }
}
/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