Step #1 - Think of any 3-digit number(cannot be a repeated single digit number e.g 666 etc) | e.g 123
Step #2 - Reverse your number | e.g 321
Step #3 - In the application put highest number in the "Largest Number" text box then the least highest number in the "Lowest Number" text box in part 1 | e.g i'd put 123 in "Lowest Number" and 321 in the "Largest number"
Step #4 - In the part 2 box click "Get number" and it will subtract the lowest from the largest | e.g my number would be 198
Step #5 - With your new number from the text box in part 2 you want to do the same again by reversing it | e.g my new reverse number would be 891
Step #5 - Now input both of your numbers in the text boxes in part 3 it doesn't matter what order you do it | e.g in my "Number 1" i would put 891 and in "Number 2" i would put "198"
Step #6 - For the last step all you have to do is click "Get Answer" and if you did this correctly you will get 1089 and a message saying you've done it correctly | e.g You Got 1089 which is the correct number, congratulations!