package main

import "fmt"

func main() {
	var n int
	fmt.Scan(&n)
	cur1, cur3, sum, mod := 1, 3, 0, 1000000007
	for i := 0; i < n; i++ {
		cur1 = cur1 * 10 % mod
		if i > 0 {
			cur3 = cur3 * 10 % mod
		}
		sum = (sum + cur3) % mod
	}
	sum = (sum + cur1) % mod
	fmt.Println(sum)
}