After input digit press left arrow, User
moves highlight to "equals" sign to
calculate digits.
User continues with a new calculation.
The example of maxium input cipher
(The priority of the calculation is
calculated in accordance with the
sequence of data input. It's because
it doesn't offer parenthesis). Other
operations will be done in the same way
Calculator
1234+5678
S C E
=
+ - x /
EXIT
SELECT
Calculator
58023
S C E =
+
- x /
SELECT
EXIT
123+456+79-234+23+1
234x567.8/25
S C E =
+
- x /
EXIT
SELECT
89