#include <bits/stdc++.h>
using namespace std;
int main(){
    int m,n,s;
    cin>>m>>n>>s;
    cout<<m*s/n;
    return 0;
}
/**************************************************************
	Problem: 1323
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/