def mod_repeated_number(n: int, k: int, mod: int) -> int:
    """n を k 回繰り返した整数を mod で割った余りを求める"""
    nd = len(str(n))

    def pow10(exp: int) -> int:
        return pow(10, exp, mod)

    def rec(k: int):
        if k == 1: return n
        k2 = k // 2
        x = rec(k2)
        r = ((x * pow10(k2 * nd) % mod) + x) % mod
        if k % 2 == 1:
            r = ((r * pow10(nd) % mod) + n) % mod

        return r

    if n == 0: return 0
    return rec(k)


MOD = 10 ** 9 + 7
N = int(input())

ans = pow(10, N, MOD) + mod_repeated_number(3, N, MOD)
ans %= MOD
print(ans)