import java.util.Scanner;
 
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 ans = 0;
		if (N%(A+B) == 0) {
			ans = A*(N/(A+B));
		} else if (A <= N%(A+B)) {
			ans = A*(N/(A+B)) + A;
		} else {
			ans = A*(N/(A+B)) + N%(A+B);
		}
		System.out.println(ans);
	}
}
/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