import java.util.Scanner;

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

		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		int T = Integer.parseInt(sc.next());

		double c = (T+0.5)/A * B;
		int a =(int) c /B;
		System.out.println(a*B);

	}
} import java.util.Scanner; Scanner java.util class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		int T = Integer.parseInt(sc.next());

		double c = (T+0.5)/A * B;
		int a =(int) c /B;
		System.out.println(a*B);

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

		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		int T = Integer.parseInt(sc.next());

		double c = (T+0.5)/A * B;
		int a =(int) c /B;
		System.out.println(a*B);

	} main {

		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		int T = Integer.parseInt(sc.next());

		double c = (T+0.5)/A * B;
		int a =(int) c /B;
		System.out.println(a*B);

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int A = Integer.parseInt(sc.next()); A Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int B = Integer.parseInt(sc.next()); B Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int T = Integer.parseInt(sc.next()); T Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc double c = (T+0.5)/A * B; c (T+0.5)/A * B (T+0.5)/A (T+0.5) T 0.5 A B int a =(int) c /B; a (int) c /B (int) c B System.out.println(a*B) System.out.println System.out System System.out a*B a B String[] args args
import java.util.Scanner;

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

		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		int T = Integer.parseInt(sc.next());

		double c = (T+0.5)/A * B;
		int a =(int) c /B;
		System.out.println(a*B);

	}
}
