Surround CALC description
It is calculable at the following steps.
1. Carry out the tap of the screen.
2. Input a numerical value with a ten key.
3. Repeat.
3. Surround numerical values.
4. Carry out the tap of the region.
5. A calculation result is displayed.
It can use also as a handwritten memo.
Since large area can be used by a tablet, it is more convenient.