import java.io.*;
import java.util.Scanner;
 
public class Main {
 
  public static void main(String[] args) {
 
    try {
      // 標準入力受け取り
      Scanner scan = new Scanner(System.in);      
      Long sum      = Long.parseLong(scan.next());
      Long blue     = Long.parseLong(scan.next());
      Long red      = Long.parseLong(scan.next());
      Long result   = sum/(blue+red)*blue;
      
      // 「合計と青+赤の余り」と「青いボールの数」を比較し、小さい数を加算
      result += Math.min(sum%(blue+red), blue);

      System.out.println(result);
      
    } catch (Exception e) {     
      System.out.print("error");
    }
  }
}
/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