import java.util.*;

/**
 * Main
 */
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int A = sc.nextInt();
		int B = sc.nextInt();
		int T = sc.nextInt();
		int Bis = 0;
		int Time = 0;
		while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		}

		System.out.println(Bis);

		sc.close();
	}
}; import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int A = sc.nextInt();
		int B = sc.nextInt();
		int T = sc.nextInt();
		int Bis = 0;
		int Time = 0;
		while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		}

		System.out.println(Bis);

		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int A = sc.nextInt();
		int B = sc.nextInt();
		int T = sc.nextInt();
		int Bis = 0;
		int Time = 0;
		while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		}

		System.out.println(Bis);

		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int A = sc.nextInt();
		int B = sc.nextInt();
		int T = sc.nextInt();
		int Bis = 0;
		int Time = 0;
		while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		}

		System.out.println(Bis);

		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 int T = sc.nextInt(); T sc.nextInt() sc.nextInt sc int Bis = 0; Bis 0 int Time = 0; Time 0 while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		} Time >= 0 Time 0 {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		} Time += A Time A if (Time > T + 0.5) {
				break;
			} Time > T + 0.5 Time T + 0.5 T 0.5 {
				break;
			} break; Bis += B Bis B System.out.println(Bis) System.out.println System.out System System.out Bis sc.close() sc.close sc String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int A = sc.nextInt();
		int B = sc.nextInt();
		int T = sc.nextInt();
		int Bis = 0;
		int Time = 0;
		while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		}

		System.out.println(Bis);

		sc.close();
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int A = sc.nextInt();
		int B = sc.nextInt();
		int T = sc.nextInt();
		int Bis = 0;
		int Time = 0;
		while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		}

		System.out.println(Bis);

		sc.close();
	}
} Main
import java.util.*;

/**
 * Main
 */
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int A = sc.nextInt();
		int B = sc.nextInt();
		int T = sc.nextInt();
		int Bis = 0;
		int Time = 0;
		while (Time >= 0) {
			Time += A;
			if (Time > T + 0.5) {
				break;
			}
			Bis += B;
		}

		System.out.println(Bis);

		sc.close();
	}
};
