import java.util.Scanner;

public class Main{

    public static void main(String[] args){
        // 変数宣言
        long total = 0;
        long blue = 0;
        long result = 0;
        long n;
        long a;
        long b;

        // 入力
        Scanner sc = new Scanner(System.in);
        
        n = Long.parseLong(sc.next());
        a = Long.parseLong(sc.next());
        b = Long.parseLong(sc.next());

        sc.close();

        // 演算処理
        long i = n / ( a + b );
        long j = n % ( a + b ); 
        result = a*i;

        if( j < a ){
            result = result + j;
        }else{
            result = result + a;
        }

        // resultを出力
        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