import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       double number1 = sc.nextInt();
       double number2 = sc.nextInt();
       double number3 = sc.nextInt();
        System.out.println(number1 / number2 * number3);
    }
}