#include <iostream>
using namespace std;
typedef long long LL;
int main(int argc, char* argv[])
{
	LL A,B,C;
	cin>>A>>B>>C;
	LL X=C/(A-1+B);
	LL Y=C%(A-1+B);
	cout<<A*X+Y<<endl;
	/*
	if (C<A){
		cout<<C<<endl;
		return 0;
	}
	LL year=0;
	LL money=0;
	while(true){
		if (money+A-1<=C){
			year+=A-1;
			money+=A-1;
		}else{
			
		}
		if (year%A==0){
			money+=B;
		}else{
			money++;
		}
		if (money>=C){
			cout<<year<<endl;
			return 0;
		}


			year++;

	}
	*/
	return 0;
}