import javax.swing.*;
import java.text.*; 

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

       {
         String initLoanStr, interestStr, yearStr;
         double initLoan, interest, monthPay, amountLeft;
         double minMonthPay, maxMonthPay,monthPayGuess, monthInterest,totalInterest;
         int year,month;

        // Get Data

         initLoanStr = JOptionPane.showInputDialog(null,"Enter Loan Amount");
         interestStr = JOptionPane.showInputDialog(null,"Enter Annual Interest");
         yearStr = JOptionPane.showInputDialog(null,"Enter number of years to payoff");
         initLoan = Double.parseDouble(initLoanStr); 
         interest = Double.parseDouble(interestStr); 
         year = Integer.parseInt(yearStr);

         interest = interest/100.0;   // convert to decimal
         minMonthPay = initLoan*interest/12.0;
         maxMonthPay = initLoan;

         monthPayGuess = (minMonthPay+maxMonthPay)/2.0;
         while ((monthPayGuess-minMonthPay)>0.0001)
           {
              amountLeft = initLoan;
              month = 0;
              while ((amountLeft >0)&&(month < 12*year))
                 {
                     monthInterest = amountLeft*interest/12.0;
                     amountLeft = amountLeft - (monthPayGuess-monthInterest);
                     month++;
                 }

              if (amountLeft > 0) minMonthPay = monthPayGuess;
              else  maxMonthPay = monthPayGuess;
              monthPayGuess = (minMonthPay+maxMonthPay)/2.0;
                 
            }
         
         DecimalFormat df = new DecimalFormat("0.00");

         JOptionPane.showMessageDialog(null,"Your monthly payment will be $" 
                                      +  df.format(monthPayGuess));
                                       
                     
           
       System.exit(0);
       
    }
}