NumberMania V2.0β5 Update

The usage of Constants and Variables has been improved so that they can be easily accessed and edited for Calc.

For Constants, they can be chosen after being filtered by group when touching character-input box.

Now Variables can be assigned (for example, after input @a,  push '=' button and input any value or expression then it will be assigned to the variable '@a'.) and values of which will be kept and used in subsequent calc until the app exits.

Here are some screenshots.