import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextDouble() + 0.5;
		int sum = 0;
		double time = t / a;

		for (int i = 1; i < time; i++) {
			sum += b;
		}

		System.out.println(sum);

		sc.close();

	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextDouble() + 0.5;
		int sum = 0;
		double time = t / a;

		for (int i = 1; i < time; i++) {
			sum += b;
		}

		System.out.println(sum);

		sc.close();

	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextDouble() + 0.5;
		int sum = 0;
		double time = t / a;

		for (int i = 1; i < time; i++) {
			sum += b;
		}

		System.out.println(sum);

		sc.close();

	} main {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextDouble() + 0.5;
		int sum = 0;
		double time = t / a;

		for (int i = 1; i < time; i++) {
			sum += b;
		}

		System.out.println(sum);

		sc.close();

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc double t = sc.nextDouble() + 0.5; t sc.nextDouble() + 0.5 sc.nextDouble() sc.nextDouble sc 0.5 int sum = 0; sum 0 double time = t / a; time t / a t a for (int i = 1; i < time; i++) {
			sum += b;
		} int i = 1; int i = 1; i 1 i < time i time i++ i++ i {
			sum += b;
		} {
			sum += b;
		} sum += b sum b System.out.println(sum) System.out.println System.out System System.out sum sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextDouble() + 0.5;
		int sum = 0;
		double time = t / a;

		for (int i = 1; i < time; i++) {
			sum += b;
		}

		System.out.println(sum);

		sc.close();

	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextDouble() + 0.5;
		int sum = 0;
		double time = t / a;

		for (int i = 1; i < time; i++) {
			sum += b;
		}

		System.out.println(sum);

		sc.close();

	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextDouble() + 0.5;
		int sum = 0;
		double time = t / a;

		for (int i = 1; i < time; i++) {
			sum += b;
		}

		System.out.println(sum);

		sc.close();

	}
}
