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();
        int t = sc.nextInt();
        int sum = 0;
        for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        }
    }
} 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();
        int t = sc.nextInt();
        int sum = 0;
        for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int t = sc.nextInt();
        int sum = 0;
        for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int t = sc.nextInt();
        int sum = 0;
        for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        }
    } 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 int t = sc.nextInt(); t sc.nextInt() sc.nextInt sc int sum = 0; sum 0 for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        } int i = 1; int i = 1; i 1 i++ i++ i {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        } {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        } sum = i * a sum i * a i a if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            } sum > t sum t {
                System.out.println((i - 1) * b);
                return;
            } System.out.println((i - 1) * b) System.out.println System.out System System.out (i - 1) * b (i - 1) i 1 b return; 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();
        int t = sc.nextInt();
        int sum = 0;
        for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int t = sc.nextInt();
        int sum = 0;
        for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        }
    }
} 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();
        int t = sc.nextInt();
        int sum = 0;
        for (int i = 1; ;i++) {
            sum = i * a;
            if(sum > t) {
                System.out.println((i - 1) * b);
                return;
            }
        }
    }
}