#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

signed main(){
    ios::sync_with_stdio(false);
	cin.tie(0);
 
    ll a,b,c;
    cin>>a>>b>>c;
    ll ans=0;
    ll get=b+a-1;
    ans = c/get*a;
    if(c%get){
        ans+=c%get;
    }
    cout<<ans<<endl;
}