Because it is already there? Because it is free? No, 'cause you didn't know until yet, how it has to be. Desargues is a real simple calculator. You type in your formula and after pressing the equal sign, the result will be added behind it. Change the formula, the result will follow. A small and innovative calculator for your Windows desktop. Change the way you work. Simple, obvious, how it has to be.
Read The publisher description in: French