#include<bits/stdc++.h>
#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
#define ll long long
#define INF  0x7fffffff//ffffffff
#define M 1010
ll a,b,t;
int mian(void){
	cin>>a>>b>>t;
	cout<<(t/a)*b<<endl;
}