#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,d;
	cin>>a>>b>>c;
	d=c/b*a;
	cout<<d;
}
/**************************************************************
	Problem: 1323
	User: zengyixuan
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/