import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // TODO 自動生成されたメソッド・スタブ

    	Scanner sc = new Scanner(System.in);

    	int A = sc.nextInt();
    	int B = sc.nextInt();
    	int T = sc.nextInt();

    	double val = (T + 0.5) / A;
    	BigDecimal val2 = new BigDecimal(val);
    	BigDecimal seijo = val2.setScale(0, BigDecimal.ROUND_DOWN);

    	int val3 = seijo.intValue();

    	System.out.println( B * val3);

    	sc.close();
    }


}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz