Calculating Troubles
Most obvious – Have a calculator at hand for the hard calculations, I use one when the calculations become 14 X 13 and higher. Use the keyboard numbers and enter button as it’s a lot quicker than using the number pad supplied with the game. – Lesley Maughan
Pause the game
Whenever you feel it necessary to use a calculator just click up at the top of the window, where you would to move it, and the game will pause. with the mouse still clicking use the calculator. Then let go and type in the answer. – bob1124