#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
int main(void){
	double a,b,t;
	while(cin>>a>>b>>t){
		ll n;
		n = (t+0.5)/a*b;
		printf("%lld\n",n);
	}
}