import java.util.Scanner;

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();

        long C=N%(A+B);
        if(C>=A){
            C=A;
        }
        

        System.out.println(N/(A+B)*A+C);
        
        
    }

}
/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