CalcuTray is a small, quick, and easy to use calculator that lives in the
Notification Tray, often called the System Tray, the Systray or "by the
clock". With one click of the mouse you have access to a fully functional
calculator. Functions: • + - * / ( ) ; Convert decimals to fractions: Ctrl F
; Convert fractions to decimals: Ctrl D; Square root: Ctrl S; Calculate Pi to
28 places: Ctrl P; Pi can be used in calculations: e. (in Business and
Productivity)