import java.io.*; import java.math.BigInteger; import java.util.Arrays; public class Main implements Runnable { static ContestScanner in; static Writer out; public static void main(String[] args) { new Thread(null, new Main(), "", 16 * 1024 * 1024).start(); } public void run() { Main main = new Main(); try { in = new ContestScanner(); out = new Writer(); main.solve(); out.close(); in.close(); } catch (IOException e) { e.printStackTrace(); } } void solve() throws IOException { final long mod = 1000000007; long b = in.nextLong(); long c = in.nextLong(); long d = in.nextLong(); if (c % mod == 1) { System.out.println(b % mod * d % mod); return; } b %= mod; c %= mod; long ans = b * c % mod * ((modpow(c, d, mod) - 1 + mod) % mod) % mod * modinv((c - 1 + mod) % mod, mod) % mod; System.out.println(ans); } long modpow(long n, long a, long mod){ long res = 1; while(a > 0){ if((a&1)==1) res = (res * n) % mod; n = n * n % mod; a >>= 1; } return res; } long modinv(long n, long mod){ return modpow(n, mod-2, mod); } } class Writer extends PrintWriter{ public Writer(String filename)throws IOException {super(new BufferedWriter(new FileWriter(filename)));} public Writer()throws IOException {super(System.out);} } class ContestScanner implements Closeable { private BufferedReader in;private int c=-2; public ContestScanner()throws IOException {in=new BufferedReader(new InputStreamReader(System.in));} public ContestScanner(String filename)throws IOException {in=new BufferedReader(new InputStreamReader(new FileInputStream(filename)));} public String nextToken()throws IOException { StringBuilder sb=new StringBuilder(); while((c=in.read())!=-1&&Character.isWhitespace(c)); while(c!=-1&&!Character.isWhitespace(c)){sb.append((char)c);c=in.read();} return sb.toString(); } public String readLine()throws IOException{ StringBuilder sb=new StringBuilder();if(c==-2)c=in.read(); while(c!=-1&&c!='\n'&&c!='\r'){sb.append((char)c);c=in.read();} return sb.toString(); } public long nextLong()throws IOException,NumberFormatException {return Long.parseLong(nextToken());} public int nextInt()throws NumberFormatException,IOException {return(int)nextLong();} public double nextDouble()throws NumberFormatException,IOException {return Double.parseDouble(nextToken());} public void close() throws IOException {in.close();} }