import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
	public static void main(String[] args) {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		Scanner in = new Scanner(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		B solver = new B();
		solver.solve(1, in, out);
		out.close();
	}

	static class B {
		public void solve(int testNumber, Scanner in, PrintWriter out) {
			long n = in.nextLong(), a = in.nextLong(), b = in.nextLong();
			long blue = 0;

			//		if(a != 0 && b != 0) {
			//            while (n > 0) {
			//                if (n >= a) {
			//                    blue += a;
			//                } else {
			//                    blue += n;
			//                }
			//
			//                n -= (a + b);
			//
			//            }
			//        }

			blue += n / (a + b) * a;

			long amari = n % (a + b);
			if (amari > 0) {
				if (amari >= a) {
					blue += a;
				} else {
					blue += amari;
				}
			}

			out.println(blue);
		}

	}
}


/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