import java.util.*;
public class Main{
	public static void main(String [] args){
		Scanner in = new Scanner(System.in);
		long n = in.nextLong();
		long b = in.nextLong();
		long r = in.nextLong();
		long bl =0;
		bl+=(n/(b+r))*b;
		long rem = n%(b+r);
		if(rem>b){
			bl+=b;
		}
		else{
			bl+=rem;
		}
		System.out.print(bl);
	}
}
/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