import java.util.*;
class Main {
	public static void main(String[] args) throws Exception {
		final Scanner sc = new Scanner(System.in);

        final long N = sc.nextLong();
        final long A = sc.nextLong();
        final long B = sc.nextLong();
        long AB = A + B;
        long num = N / AB;
        long amari = N % AB;

        long sum = num * A;
        if(amari >= A)
            sum += A;
        else    
            sum += amari;
        System.out.println(sum);
    }

}

/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