import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());

        for (int i = 0; i < n; i++) {

            double number = Double.parseDouble(scanner.nextLine());

            double discount = number - number * 0.65;

            System.out.printf("%.2f%n",discount);
        }
    }
}