fn getline() -> String {
    let mut rv = String::new();

    std::io::stdin().read_line(&mut rv).ok();

    return rv;
}

fn fact_mod(n: u64) -> u64 {
    let mut rv = 1;
    
    for m in 1 .. (n + 1) {
        rv = (rv * m) % 1000000007; 
    }

    rv
}

fn main() {
    let n: u64 = getline().trim().parse().unwrap();

    println!("{}", fact_mod(n));
}