can I use c language with AI2

I want to know that can I use C language with App inventor 2.

example I write calculator program by C and I want to use it help me calculate in app inventor 2.

No, unfortunately, you can't...

I once prepared an example to run Python code in the webviewer of App Inventor, see here

How to use App Inventor and Skulpt to run Python code

in case you can find a similar library for C, you could do it