import java.util.*;
class Main{
    public static void main(String[] args){
	Scanner stdIn = new Scanner(System.in);
	Long N = Long.parseLong(stdIn.next());
	Long A = Long.parseLong(stdIn.next());
	Long B =  Long.parseLong(stdIn.next());
	Long k = N/(A+B)*A;
	Long n =N%(A+B);
	Long j=Math.min(n,A);
	System.out.println(k+j);
    }
}

/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