https://goo.gl/images/JJRrbi
This stock image shows piano keys with the names of the keys: Do, Re, Mi, Fa, So, La, Ti.

Try to learn the keys until you can remember them. This will make playing piano much easier. 🙂👍

Here’s another stock photo that names the piano keys for the C major seven note scale, using the key names C, D, E, F, G, A, B:

https://www.dreamstime.com/royalty-free-stock-image-piano-octave-keys-notes-named-image13966166