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();
		double time = 0;
		int count = 0;
		while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		}
		System.out.println(count);
	}
} 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();
		double time = 0;
		int count = 0;
		while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		}
		System.out.println(count);
	}
} 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();
		double time = 0;
		int count = 0;
		while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		}
		System.out.println(count);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int t = sc.nextInt();
		double time = 0;
		int count = 0;
		while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		}
		System.out.println(count);
	} 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 double time = 0; time 0 int count = 0; count 0 while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		} time < t + 0.5 time t + 0.5 t 0.5 {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		} count += b count b time += a time a if (time > t + 0.5) {
				count -= b;
				break;
			} time > t + 0.5 time t + 0.5 t 0.5 {
				count -= b;
				break;
			} count -= b count b break; System.out.println(count) System.out.println System.out System System.out count 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();
		double time = 0;
		int count = 0;
		while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		}
		System.out.println(count);
	}
} 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();
		double time = 0;
		int count = 0;
		while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		}
		System.out.println(count);
	}
} 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();
		double time = 0;
		int count = 0;
		while (time < t + 0.5) {
			count += b;
			time += a;
			if (time > t + 0.5) {
				count -= b;
				break;
			}
		}
		System.out.println(count);
	}
}
