import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);

        long n = stdIn.nextLong();
        long a = stdIn.nextLong();
        long b = stdIn.nextLong();

        if(n%(a+b) < a){
            System.out.println((n/(a+b)*a)+(n%(a+b)));
        }else{
            System.out.println((n/(a+b)*a)+a);
        }
    }
}
/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