sp.cpp

#include <iostream>
#include <fstream>


using namespace std;
/*
/Users/toan/ued/16-10-2018/SP
*/

ifstream fi ("SP.INP");
ofstream fo ("SP.OUT");
int main(){

	int m,n,t;
	long int sum;

	/**
		goi x la so but can phai tra tien
		khi mua m chiec thi duoc tang 1 chiec, vay mua x chiec se dc tang x/m
		x + x/m = n 
		=> x = (n*m)/(m+1)
	*/

	fi >> m >> n >> t;

	sum = ((n*m)/(m+1)) *t;
	fo << sum;

	return 0;

}