import java.util.Scanner;

    public class FracCalc
    {
            static int wholeNumber1;
            static int numerator1;
            static int denominator1 = 1;
            static int wholeNumber2;
            static int numerator2;
            static int denominator2 = 1;

            public static void main(String[] args)
            {
                    Scanner console = new Scanner(System.in);
                    boolean go = true;
                    do
                    {
                            System.out.print("Enter an equation: ");
                            String operand1 = console.next();
                            if (operand1.equalsIgnoreCase("quit"))
                            {
                                    go = false;
                            }
                            String operator = console.next();
                            String operand2 = console.next();
                            parseOperand1(operand1);
                            parseOperand2(operand2);
                            int newNumerator1 = convertImproper(wholeNumber1, numerator1, denominator1, operand1);
                            int newNumerator2 = convertImproper(wholeNumber2, numerator2, denominator2, operand2);
                            System.out.print("The equation is: " + newNumerator1 + "/" + denominator1);
                            System.out.print(" " + operator + " ");
                            System.out.println(newNumerator2 + "/" + denominator2);
                    }
                    while(go == true);
                    System.out.println("Thanks for using FracCalc! Have a wonderful day!");
                            console.close();
            }

            public static void parseOperand1(String number)
            {
                    if(number.indexOf('_') == -1)
                    {
                            wholeNumber1 = 0;
                    }
                    else
                    {
                            wholeNumber1 = Integer.parseInt(number.substring(0,number.indexOf('_')));
                    }

                    numerator1 = Integer.parseInt(number.substring(number.indexOf('_') +1, number.indexOf('/')));
                    denominator1 = Integer.parseInt(number.substring(number.indexOf('/') +1));
            }

            public static void parseOperand2(String number)
            {
                    if(number.indexOf('_') == -1)
                    {
                            wholeNumber2 = 0;
                    }
                    else
                    {
                            wholeNumber2 = Integer.parseInt(number.substring(0,number.indexOf('_')));
                    }
                    numerator2 = Integer.parseInt(number.substring(number.indexOf('_') +1, number.indexOf('/')));
                    denominator2 = Integer.parseInt(number.substring(number.indexOf('/') +1));
            }

            public static int convertImproper(int wholeNumber, int numerator, int denominator, String number)
            {
                    if(number.indexOf('_') == -1)
                    {
                            return numerator;
                    }
                    else
                    {
                            return wholeNumber * denominator + numerator;
                    }
            }
    }