import java.util.Arrays;
import java.util.Scanner;

public class Main {
	final long MODULO = 1_000_000_000 + 7;

	void run() {
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong();
		if (n == 1) {
			System.out.println(3);
			return;
		}
		if (n % 2 == 0) {
			System.out.println(4 * pow(5, n / 2 - 1) % MODULO);
		} else {
			System.out.println(4 * pow(5, n / 2 - 1) * 3 % MODULO);
		}
	}

	long pow(long a, long n) {
		long ret = 1;
		for (; n > 0; n >>= 1, a = (a * a) % MODULO) {
			if (n % 2 == 1) {
				ret = ret * a % MODULO;
			}
		}
		return ret;
	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

	public static void main(String[] args) {
		new Main().run();
	}
}