import java.util.*;
import java.io.*;
public class FiveProducts
{
    static DataInputStream dis = new DataInputStream(System.in);
        static StringTokenizer st;
    public static void main(String args[])throws IOException
    {              
        //create file where data to be stored
        FileOutputStream fos = new FileOutputStream("fivepro.dat");
        DataOutputStream dos = new DataOutputStream(fos);
 
           //declare variables
      int prodcode[]= new int[4];
      double cost[]= new double[4];
      int quantity[]=new int[4];
        DataInputStream din = new DataInputStream(new FileInputStream("fivepro.dat"));
        //reading from console
      for(int i=0;i<4;i++)
      {
        System.out.println("enter code number for items = " + i);
        st = new StringTokenizer(dis.readLine());
         prodcode[i] = Integer.parseInt(st.nextToken());
        dos.writeInt(prodcode[i]);  //write to file
 
    }
      for(int j=0;j<4;j++)
      {
          System.out.println("enter cost of item = " + j);
          st = new StringTokenizer(dis.readLine());
          cost[j]= new Double(st.nextToken()).doubleValue();
          dos.writeDouble(cost[j]); // write to file
 
      }    
 
      for(int k=0;k<4;k++)
      {
          System.out.println("enter quantity of item = " + k);
          st = new StringTokenizer(dis.readLine());
          quantity[k] = Integer.parseInt(st.nextToken());
          dos.writeInt(quantity[k]); // write to file
 
       }
      dos.close();
      din.close();
 
 
   }          
}

line = readNewLine();
ArrayList values = new ArrayList();
while (line != null){
   values.add(line);
   line = readNewLine();
}

import java.util.*;
import java.io.*;
public class Fiveproducts1
{
 
    static DataInputStream dis = new DataInputStream(System.in);
        static StringTokenizer st;
    public static void main(String args[])throws IOException
    {              
        //create file where data to be stored
        FileOutputStream fos = new FileOutputStream("fivepro.dat");
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        DataOutputStream dos = new DataOutputStream(bos);
 
           //declare variables
      int prodcode[]= new int[4];
      int cost[]= new int[4];
      int quantity[]=new int[4];
       FileInputStream fis = new FileInputStream("fivepro.dat");
       BufferedInputStream bis = new BufferedInputStream(fis);
        DataInputStream din = new DataInputStream(bis);
        //reading from console
      for(int i=0;i<prodcode.length;i++)
      {
        System.out.println("enter code number for items = " + i);
        st = new StringTokenizer(dis.readLine());
         prodcode[i] = Integer.parseInt(st.nextToken());
        dos.writeInt(prodcode[i]);  //write to file
 
 
         System.out.println("enter cost of item = " + i);
          st = new StringTokenizer(dis.readLine());
          cost[i]= Integer.parseInt(st.nextToken());
          dos.writeInt(cost[i]); // write to file
 
 
          System.out.println("enter quantity of item = " + i);
          st = new StringTokenizer(dis.readLine());
          quantity[i] = Integer.parseInt(st.nextToken());
          dos.writeInt(quantity[i]); // write to file
 
       }
         try
         {     
        int Itemcost = din.readInt();
        int Quantity = din.readInt();
        int totalcost = Itemcost * Quantity ;
        System.out.println("total cost of items = " + totalcost);
         }
         catch(EOFException e)
         {
         System.err.print(e);
         }
         dos.close();
         din.close();
 
      }          
}