import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        long N, A, B;
        Scanner sc = new Scanner(System.in);
        N = sc.nextLong();
        A = sc.nextLong();
        B = sc.nextLong();
      long n1 = N/(A+B);
        long n2 = N%(A+B);
        
        System.out.println(A*n1+(n2>=A?A:n2));
    }
}
/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