Wisdom Calculator

Wisdom input
- Internal value use fraction and big number store and arithmetic, so one divide by seven then multiply by seven, it
will restore one.
- Memories of previous input and numerical computation, then this value equals the input before automatically added
and after operation value calculation output.
- Wisdom input operation Example:
   1. Enter: 1000 x 1% =
   2. Display: 10
   3. Enter: 5000 =
   4. Display: 50