use std::io::*;
use std::str::FromStr;
use std::cmp::{min, max};
use std::mem::swap;
use std::collections::HashMap;

fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin_lock = stdin.lock();
    let s = stdin_lock
        .bytes()
        .map(|c| c.unwrap() as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect::<String>();
    s.parse::<T>().ok().unwrap()
}

static DX: &'static [i32] = &[0, 0, 1, -1];
static DY: &'static [i32] = &[1, -1, 0, 0];

fn main() {
    let b: u64 = read();
    let c: u64 = read();
    let d: u64 = read();

    let m = 1000000007u64;

    let mut p = pow_mod(c, d + 1, m);

    p = ((p + m - (c % m)) * (b % m)) % m;

    p = p * pow_mod(c - 1, m - 2, m) % m;

    println!("{}", p);
}

fn pow_mod(mut n: u64, mut exp: u64, m: u64) -> u64 {
    let mut t = 1;

    n %= m;

    while exp > 1 {
        if exp & 1 == 1 {
            t *= n;
            t %= m;
        }

        n *= n;
        n %= m;
        exp >>= 1;
    }

    (n * t) % m
}