calculator template for teacher to add to presentations?

I dont know to which product to direct this question quite yet so forgive its vagueness. I am a teacher and would like to incorporate a calculator animation/graphic/insert your idea that would show numbers I type into it (virtually) and placed into my presentations. (Imagine if I was to hold a camera above my physical calculator typing in data and it was filmed and then published). I have access to the Adobe creative cloud and use after effects. I was imagining/ hoping that there would be a template or some system that teachers used to insert something like this easily? Meaning the animation structure was set up and from there I could quickly change the numbers placed into it to visually show my actions. Does anyone have any direction on where I could build this? Thank you!