#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0;i < n;i++)
template<class T> bool chmin(T &a,T b){
    if(a>b){a = b;return true;}
    return false;
}
template<class T> bool chmax(T &a,T b){
    if(a<b){a = b;return true;}
    return false;
}

using ll = long long;
using ld = long double;

const int INF = 1e9+5;
// const int mod = 1000000007;
const int mod = 998244353;

void no(){
    cout << "No" << endl;exit(0);
}
void yes(){
    cout << "Yes" << endl; exit(0);
}
#define all(x) x.begin(),x.end()


int main(){
    int A,B,X;cin >> A >> B >> X;
    int k = (X+A-1)/A;
    cout << k*B << endl;

}