import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
  	long n,a,b,sum=0;
    n=sc.nextLong();
    a=sc.nextLong();
    b=sc.nextLong();
    
    sum=(n/(a+b))*a+((n%(a+b))>a?a:(n%(a+b)));
    System.out.print(sum);
  }
}
/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