Office calculator professional edition is a very practical calculator. Although its operation mode is not rich, only the addition, subtraction, multiplication and division and percentage operation, its unique vertical operation view allows you to view every detail of operation very clearly, which is more than enough to deal with daily office operation. Main functions: - virtual vertical: the vertical operation view supporting up to 500 lines allows you to view every detail of the operation very clearly. You can also easily switch between the calculator and the full screen vertical view by clicking the vertical screen - correct vertical: you can change the value on the virtual vertical to correct- Comment vertical: you can add comments on the vertical line - operation order: let the operators of multiplication and division take precedence over addition and subtraction and display the intermediate value of multiplication and division - Fixed Point / floating point operation: you can specify the operation mode of 0-4 fixed decimal point or 20 floating decimal point- Fixed point operation supports three rounding modes (rounding / rounding) - floating point operation uses 64 bit IEEE double precision algorithm, the operation result is very reliable - it supports percentile operation, and it can display decimal and percentage at the same time, which is very useful for tax rate calculation. Update log: - operation order (multiplication / division takes precedence over addition / subtraction) - middle value (optional)- Keyboard layout with extra large plus keys