Help System (web edition)

Arithmetical operations with single numbers may be typed and activated
in the edit field. For example, to compute  142+68, type 142+68=_
and press ESC when the cursor is located immediately after '='.
Examples: 23.5*(143-22.3)=2836.45 2^10=1024 1/3+1/7=0.47619047619048
  A = More information on arithmetics