#include<bits/stdc++.h> 
using namespace std;
int main(){
	int m,n,s;
	cin>>m>>n>>s;
	cout<<(s/n)*m;
}
/**************************************************************
	Problem: 1323
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/