

import java.util.Scanner;

public class Main {

    public static void main(final String[] args) {

        try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(final String[] args) {

        try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        }
    }
} Main public static void main(final String[] args) {

        try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        }
    } main {

        try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        }
    } try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        } {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        } final Scanner sc = new Scanner(System.in) final Scanner sc = new Scanner(System.in) new Scanner(System.in) int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc int B = sc.nextInt(); B sc.nextInt() sc.nextInt sc int T = sc.nextInt(); T sc.nextInt() sc.nextInt sc int sumB = 0; sumB 0 for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            } int t = A; int t = A; t A t <= 20 t 20 t += A t += A t A {
                if (t <= T) {
                    sumB += B;
                }
            } {
                if (t <= T) {
                    sumB += B;
                }
            } if (t <= T) {
                    sumB += B;
                } t <= T t T {
                    sumB += B;
                } sumB += B sumB B System.out.println(sumB) System.out.println System.out System System.out sumB final String[] args args public class Main {

    public static void main(final String[] args) {

        try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        }
    }
} public class Main {

    public static void main(final String[] args) {

        try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        }
    }
} Main


import java.util.Scanner;

public class Main {

    public static void main(final String[] args) {

        try (final Scanner sc = new Scanner(System.in)) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int T = sc.nextInt();
            int sumB = 0;
            for (int t = A; t <= 20; t += A) {
                if (t <= T) {
                    sumB += B;
                }
            }
            System.out.println(sumB);
        }
    }
}
