import java.util.Scanner;
import java.util.Arrays;
class Main{
public static void main(String[] args){
 Scanner scan = new Scanner(System.in);
 
long N = scan.nextLong();
long A = scan.nextLong();
long B = scan.nextLong(); 
long amari = 0;
long blue = 0;
long a = N / (A + B);
 amari = N % (A + B);
  if(amari > A){
    blue = A * (a + 1);
  }
  else {
    blue = amari + (A * a);
  }
  System.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