import java.util.Scanner;
class A00125 {
  public static void main(String args[]) {
	  
        Scanner scanner = new Scanner(System.in);
		int a = scanner.nextInt();
        int b = scanner.nextInt();
        int t = scanner.nextInt();
		
		int sum=t/a*b;
		System.out.println(sum);
	}
}	
