yoshinoCALC is a free scientific calculator software like PowerToy Calc from Microsoft.

Conventional View is one of the two aspects of yoshinoCALC. The software emulates a conventional sceintific calculator. I don't think you need a detailed manual to use it. The followings are explanations for some unusual keys.

EvaluateExpress.dll is a dynamic-link library (DLL) to give a function to evaluate mathematical expression to your application. You can find its ability by using yoshinoCALC in History View. This DLL is completely free as long as you can use it for non-commercial purpose.

Requirements:
* .NET Framework

The license of this software is Freeware, you can free download and free use this calculator software.