function Main(input) {
	var array = input.split(' ');
	var mul = parseInt(array[0], 10);
  	var b = parseInt(array[1], 10);
    var time = parseInt(array[2], 10);
  	var biscuits = 0;
  	for(var i = 1; i <= time; i++) {
		if(!(i%mul)) {
          biscuits = biscuits + b;
        }
    }
  	//出力
	console.log(biscuits);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));