import java.util.*;
import java.util.Scanner;
class Main{
    public static void main(String[] args)
    {
        long n, a, b;
        long result = 0;
        long flag;
        Scanner scanner = new Scanner(System.in);
        n = scanner.nextLong();
        a = scanner.nextLong();
        b = scanner.nextLong();
        flag = n / (a + b);
        result = a * flag;
        flag = n % (a + b);
        if(flag < a){
            result += flag;
        }else{
            result += a;
        }
        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