Office Calculator Pro 2.0.0

the author of this app says:

Office calculator with a virtual tape,
fixed point or floating point calculator,
various rounding modes and percent calculation.
This is a calculator optimized for office tasks.
(Calculator, Taschenrechner, calculatrice, Kalkylator, , calcolatore, calculadora, Regnemaskine, laskin, , , )

* Calculator with virtual tape
You can switch between calculator view and and tape view to have a full screen view of the tape.
The tape of the calculator can have up to 500 lines.

* Calculator with fixed point arithmetic or floating point.
Fixed point arithmetic has 20 digits and 0 - 4 decimal places.
The floating point arithmetic has 64 bits (IEEE double precision).
By default, the calculator works with fixed point arithmetic and 2 decimal places as needed for most calculations with amounts.

* Calculator supports three rounding modes: up, down or 5/4.

* Calculator has percent calculation to add or subtract percent values.
This makes it very easy to calculate tax amounts with the calculator.

This is the Pro variant of Office Calculator, a Free variant with ads is also available.