import java.io.*;
import java.util.*;

class CaratsToGrams{
	public static void main (String[] args)throws Exception{
		//1 carat = 0.2 gram;
		BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
		System.out.print("Enter the Carat:");
		int carat = Integer.parseInt(bf.readLine());
		double gram = carat * 0.2;
		System.out.println("Gram:" + gram);
	}
}