import java.util.*;

class Main
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        long n = sc.nextLong();
        long a = sc.nextLong();
        long b = sc.nextLong();

        long ab = a+b;
        long tmp = n/ab;
        long tmp2 = n-ab*tmp;

        if (tmp2 >= a) System.out.println(a*tmp+a);
        else System.out.println(a*tmp+tmp2);
    }
}
/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