basic calculation

Calculation input (e.g. 6 - 4 ÷ 5 = 5.2)

Press "6", "ー", "4", "÷", "5", and "=" in that order.
6 - 4 ÷ 5 =" will be displayed in the calculation box, and "26/5" will be displayed in the answer box.
Tap the "Natural or Real" button, and "5.2" will be displayed.
Tap the "Natural or Real" button again, and "26/5" will be displayed.
By default, the natural number is displayed first, but the real number display can be made to take precedence in the settings screen.

Press "6", "ー", "4", "×", "5", and "=" to display "6-4×5=" in the calculation frame and "-14" in the answer frame.
Tap near the "×" or use the up/down/left/right arrow keys to make the cursor blink to the right of the "×.
Tap the "DEL" key to delete the "×".
Tap the "÷" or "=" key.

Tap "9", "÷", "3", "(", "1", "+", "2", ")", "=".
"9÷3(1+2)=" will be displayed in the calculation frame.
"1" will be displayed in the answer frame. If you omit the multiplication sign, the calculation will take precedence over the usual "×" and "÷", so "9÷(3×(1+2))" will be calculated.
If you wish to perform the calculation "9 ÷ 3 × (1+2) = 9,"
you can change this in the settings screen.