import java.util.Scanner;
 
public class Main{
  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    long N = scanner.nextLong();
    long A = scanner.nextLong();
    long B = scanner.nextLong();
    long answer = A * (N / (A+B));
    answer += Math.min(N % (A+B),A);//小さいほうの値を返す
    /*
    <上と同じ>
    if(N % (A+B) > A){
    	answer = answer + N % (A+B);
    }else{
    	answer = answer + A;
    }
    */
    System.out.println(answer);
  }
}
/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