/* package whatever; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=sc.nextInt();
		double d=t+0.5;
	     double q=d/a;
	     int r=(int)q;
	     System.out.println(r*b);
		
	}
} import java.util.*; util.* java import java.lang.*; lang.* java import java.io.*; io.* java public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=sc.nextInt();
		double d=t+0.5;
	     double q=d/a;
	     int r=(int)q;
	     System.out.println(r*b);
		
	}
} Main public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=sc.nextInt();
		double d=t+0.5;
	     double q=d/a;
	     int r=(int)q;
	     System.out.println(r*b);
		
	} main {
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=sc.nextInt();
		double d=t+0.5;
	     double q=d/a;
	     int r=(int)q;
	     System.out.println(r*b);
		
	} 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 d=t+0.5; d t+0.5 t 0.5 double q=d/a; q d/a d a int r=(int)q; r (int)q System.out.println(r*b) System.out.println System.out System System.out r*b r b String[] args args public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=sc.nextInt();
		double d=t+0.5;
	     double q=d/a;
	     int r=(int)q;
	     System.out.println(r*b);
		
	}
} public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=sc.nextInt();
		double d=t+0.5;
	     double q=d/a;
	     int r=(int)q;
	     System.out.println(r*b);
		
	}
} Main
/* package whatever; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=sc.nextInt();
		double d=t+0.5;
	     double q=d/a;
	     int r=(int)q;
	     System.out.println(r*b);
		
	}
}