#include<bits/stdc++.h>
using lint=long long;
using real=long double;
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    lint mod=1'000'000'007;
    lint b,c,d;std::cin>>b>>c>>d;b%=mod,c%=mod;
    assert(c==1||c%mod!=1);
    auto cal=[b,c,mod,memo=std::map<lint,std::pair<lint,lint>>()]
        (auto&&cal,lint x)mutable->std::pair<lint,lint>
    {
        if(x==0)return {0,1};
        if(x==1)return {1,c};
        if(auto found=memo.find(x);found!=memo.end()){
            return found->second;
        }
        auto&&[fi,ci]=cal(cal,x/2);
        auto&&[fj,cj]=cal(cal,(x+1)/2);
        return memo[x]={(fi+ci*fj)%mod,(ci*cj)%mod};
    };
    std::cout<<((cal(cal,d).first*b)%mod*c)%mod<<'\n';
}