#include<bits/stdc++.h>
#include<string>
#include<vector>
#define umap unordered_map
#define ll long long
#define pb push_back
#define sz(s) (int)s.size()
using namespace std;

ll tong=0;

int main()
{
    ios_base::sync_with_stdio(false);

    cin.tie(NULL);

    cout.tie(NULL);

    int a,b,x;

    cin>>a>>b>>x;

    if(x&a==0)cout<<b*(x/a)<<endl;

    else cout<<b*(x/a+1)<<endl;

}