This is a nPr permutation and basic calculator app. This is only iPhone version calculator application. Easy to operate and nice user interface. Kids are able to calculate addition, subtraction, multiplication and dividation.

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How to operate the application
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- Just open the application
- Then press o to 9 button and then select arithmetic operation button then again press 0 to 9 button
- then press equal button
- If you want to calculate nPr formula related operation just click nPr Button
- then input n and p value then click result button.