#include <bits/stdc++.h> using namespace std; #define int long long #define all(v) (v).begin(), (v).end() #define rall(v) (v).rbegin(), (v).rend() #define rep(i,n) for(int i=0;i<n;++i) #define rep1(i,n) for(int i=1;i<n;++i) #define exrep(i, a, b) for(ll i = a; i < b; i++) #define out(x) cout << x << endl #define EPS (1e-7) #define gearup ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); typedef long long ll; typedef long double ld; typedef unsigned long long ull; typedef vector<int> vi; typedef vector<char> vc; typedef vector<bool> vb; typedef vector<double> vd; typedef vector<string> vs; typedef vector<pair<int,int> > vpii; typedef vector<vector<int> > vvi; typedef vector<vector<char> > vvc; typedef vector<vector<bool> > vvb; typedef vector<vector<double> > vvd; typedef vector<vector<string> > vvs; typedef vector<ll> vl; typedef vector<vector<ll> > vvl; typedef vector<vector<vector<ll> > > vvvl; ll MOD = 1000000007; const long long L_INF = 1LL << 60; const int INF = 2147483647; // 2^31-1 const double PI = acos(-1); //cout<<fixed<<setprecision(10); template<class T> inline bool chmin(T& a, T b) {if (a > b) {a = b;return true;}return false;} template<class T> inline bool chmax(T& a, T b) {if (a < b) {a = b;return true;}return false;} template<class T> void debug(T v){rep(i,v.size()) cout<<v[i]<<" ";cout<<endl;} const ll dx[8] = {1, 1, 0, -1, -1, -1, 0, 1}; const ll dy[8] = {0, 1, 1, 1, 0, -1, -1, -1}; //以降 cin の入力元が 'input.txt' になる //std::ifstream in("input.txt"); //std::cin.rdbuf(in.rdbuf()); signed main() { gearup; ll v,t,p; cin >> v >> t >> p; ll res = v * (p+1); res += (res)/(t-1) + 1; out(res); }