#include "bits/stdc++.h"

/*
#include "boost/multiprecision/cpp_int.hpp"
namespace mp = boost::multiprecision;
using i128=mp::cpp_int;
*/

using namespace std;
typedef long long ll;
typedef int64_t i64;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<vvll> vvvll;
typedef vector<string> vs;
typedef vector<char> vc;
typedef vector<vc> vvc;
typedef vector<double> vd;
typedef vector<vd> vvd;
#define rep(i,a,n) for(int i=a;i<n;i++)
#define drep(i,a,n) for(int i=a;i>n;i--)
#define yes(ans) if(ans)cout<<"yes"<<endl;else cout<<"no"<<endl;
#define Yes(ans) if(ans)cout<<"Yes"<<endl;else cout<<"No"<<endl;
#define YES(ans) if(ans)cout<<"YES"<<endl;else cout<<"NO"<<endl;
#define iINF 1000000007
#define lINF 10000000000007
#define llINF 4000000000000000007
#define all(x) x.begin(),x.end()
#define so(x) sort(all(x))
#define re(x) reverse(all(x))
const double PI = acos(-1);
int main(){
    int a,b,x; cin>>a>>b>>x;
    if(x%a==0){
        cout<<x/a*b<<endl;
    }
    else{
        cout<<(x/a+1)*b<<endl;
    }
}