fn power(base: usize, m: usize) -> usize {
    if m == 0 { return 1; }
    if m == 1 { return base; }
    const DENOM: usize = 1_000_000_007;
    let val: usize = power(base, m / 2);
    return (val * val) % DENOM * power(base, m % 2) % DENOM;
}

// TODO
fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    const DENOM: usize = 1_000_000_007;

    // 4 * 10^n - 1
    let mut result = 4 * power(10, n) + DENOM - 1;
    result %= DENOM;
    // div 3 -> a ^ (p-1) ≡ 1 mod p より(フェルマーの小定理)
    result *= power(3, DENOM - 1 - 1) % DENOM;
    result %= DENOM;
    println!("{}", result);
}