Created Feature: CalculatorUpDown, how i can update the input field value ? [19627]

[From this Discussion](https://wpftoolkit.codeplex.com/discussions/440604)

The person here

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Hello,
how i can update corresponding up / down field value with calcualtor value if enter or '=' is pressed ?

PS : without any calculation, only enter number and press enter ('=')

Thanks,
regards
Marcus