import java.util.*;
public class Main {
    public static void main(String[] args){
      // 入力
      Scanner sc = new Scanner(System.in);
      long N = sc.nextLong();
      long A = sc.nextLong();
      long B = sc.nextLong();
      
      // 周期数と余りをカウント
      long roop = N / (A+B);
      long remain = N % (A+B);
      
      // 青いボールをカウント
      long result = A * roop;
      if(remain < A){
        result += remain;
      }else{
        result += A;
      }
        
      // 出力
      System.out.println(result);
    }
    
}
/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