use std::io::*;
const MOD: u128 = 1_000_000_007;

fn mod_pow(mut x: u128, mut e: u128, m: u128) -> u128 {
    let mut res = 1;
    while e > 0 {
        if e & 1 == 1 {
            res = res * x % m;
        }
        x = x * x % m;
        e >>= 1;
    }
    res
}

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let b: u128 = itr.next().unwrap().parse::<u128>().unwrap();
    let c: u128 = itr.next().unwrap().parse::<u128>().unwrap();
    let d: u128 = itr.next().unwrap().parse::<u128>().unwrap();
    if c == 1 {
        println!("{}", b * d % MOD);
    } else {
        println!(
            "{}",
            b * c % MOD * (mod_pow(c, d, MOD) - 1) % MOD * mod_pow(c - 1, MOD - 2, MOD) % MOD
        );
    }
}