Can someone review my code please

Question

I wrote a program for converting miles to kilometers and kilometers to miles. I've got it working good now, but there's something I can't figure out. The way I have it now, after you convert something, if you choose not to make another conversion, it exits the program. I'd like to make it go back to the main menu rather than exiting. In other words; if I convert miles to kilometers and then decide I want to do a kilometers to miles conversion, I'd like a way to return to the main menu without exiting the program. I would really appreciate any suggestions. Also, please feel free to give me pointers on better ways to make my code in general. Go easy though, I know I'm a newb. I didn't get any help making this, so please be kind. I apologize if it's hard to read; I wrote it in Jgrasp and it formated it weird when I opened it with wordpad.
Thanks
Here's the code:
import java.util.*;
public class Squires1
Scanner keyboard = new Scanner(System.in);
     //Allows for keyboard inputs
     public void milesToKilometers()//Method for converting miles to kilometers
          double kilometers;
          String more;//Used in option for additional conversions
          final double OFFSET = 0.62136994949495;//number for conversion
          do
               System.out.print( "Please tell me the number of miles: ");
          //Prompts user for miles
               double miles = keyboard.nextDouble();
               kilometers = (miles / OFFSET);
               //calculates number of kilometers
               System.out.println(miles + " miles is equal to " + kilometers + " kilometers.");
               System.out.println("Would you like to make another conversion?");
               System.out.println("Yes or No");
               more = keyboard.next();
                    if
                    (more.equalsIgnoreCase("Yes"))
                         System.out.println("One Moment Please");
                    else
                         System.out.println("Thanks for using my program.");
                         System.out.println("Please tell your friends.");
                         System.exit(0);//Exits program if additional conversions are not desired
               }while (more.equalsIgnoreCase("Yes"));//Repeats method if yes is typed
     public void kilometersToMiles()//Method for converting kilometers to miles
          double miles;
          String more;//Used in option for additional conversions
          final double OFFSET = 0.62136994949495;//number for conversion
          do
               System.out.print( "Please tell me the number of kilometers: ");
          double kilometers = keyboard.nextDouble();
               miles = (kilometers * OFFSET);//Converts kilometers to miles
               System.out.println(kilometers + " kilometers is equal to " + miles + " miles.");
               System.out.println("Would you like to make another conversion?");
               System.out.println("Yes or No");
               more = keyboard.next();
               if
               (more.equalsIgnoreCase("Yes"))
                    System.out.println("One Moment Please");
               else
                    System.out.println("Thanks for using my program.");
                    System.out.println("Please tell your friends.");
                    System.exit(0);//exits program if user types "no"
               }while (more.equalsIgnoreCase("Yes"));//Repeats loop if user types "yes"
          public static void main(String[] args)//main method
               Squires1 s1 = new Squires1();//creates new instance of class      
               int option;
               Scanner keyboard = new Scanner(System.in);//allows for keyboard inputs
     System.out.println( "I can convert distances for you. Please tell me what you'd like to do.");
     System.out.println( "1. Convert miles to kilometers ");
               System.out.println( "2. Convert kilometers to miles ");
               System.out.println( "3. End our session. ");
     option = keyboard.nextInt();
          if (option == 1)
               s1.milesToKilometers();//runs milesToKilometers method
                    if (option == 2)
                    s1.kilometersToMiles();//runs kilometersToMiles method                }
                    if (option == 3)
                         System.out.println("Thanks for using my program.");
                         System.out.println("Have a nice day.");
               }while (option != 3);//Repeats main method as long as user doesn't type 3
}

Answer 1

Here's another instance of my code with tags.
import java.util.*;
public class Squires1
Scanner keyboard = new Scanner(System.in);
//Allows for keyboard inputs
public void milesToKilometers()//Method for converting miles to kilometers
double kilometers;
String more;//Used in option for additional conversions
final double OFFSET = 0.62136994949495;//number for conversion
do
System.out.print( "Please tell me the number of miles: ");
//Prompts user for miles
double miles = keyboard.nextDouble();
kilometers = (miles / OFFSET);
//calculates number of kilometers
System.out.println(miles + " miles is equal to " + kilometers + " kilometers.");
System.out.println("Would you like to make another conversion?");
System.out.println("Yes or No");
more = keyboard.next();
if
(more.equalsIgnoreCase("Yes"))
System.out.println("One Moment Please");
else
System.out.println("Thanks for using my program.");
System.out.println("Please tell your friends.");
System.exit(0);//Exits program if additional conversions are not desired
}while (more.equalsIgnoreCase("Yes"));//Repeats method if yes is typed
public void kilometersToMiles()//Method for converting kilometers to miles
double miles;
String more;//Used in option for additional conversions
final double OFFSET = 0.62136994949495;//number for conversion
do
System.out.print( "Please tell me the number of kilometers: ");
double kilometers = keyboard.nextDouble();
miles = (kilometers * OFFSET);//Converts kilometers to miles
System.out.println(kilometers + " kilometers is equal to " + miles + " miles.");
System.out.println("Would you like to make another conversion?");
System.out.println("Yes or No");
more = keyboard.next();
if
(more.equalsIgnoreCase("Yes"))
System.out.println("One Moment Please");
else
System.out.println("Thanks for using my program.");
System.out.println("Please tell your friends.");
System.exit(0);//exits program if user types "no"
}while (more.equalsIgnoreCase("Yes"));//Repeats loop if user types "yes"
public static void main(String[] args)//main method
Squires1 s1 = new Squires1();//creates new instance of class
int option;
Scanner keyboard = new Scanner(System.in);//allows for keyboard inputs
System.out.println( "I can convert distances for you. Please tell me what you'd like to do.");
System.out.println( "1. Convert miles to kilometers ");
System.out.println( "2. Convert kilometers to miles ");
System.out.println( "3. End our session. ");
option = keyboard.nextInt();
if (option == 1)
s1.milesToKilometers();//runs milesToKilometers method
if (option == 2)
s1.kilometersToMiles();//runs kilometersToMiles method }
if (option == 3)
System.out.println("Thanks for using my program.");
System.out.println("Have a nice day.");
}while (option != 3);//Repeats main method as long as user doesn't type 3
}