0_Apprentice
I'm learning how to play the piano.
1_Wizard
That's wonderful. It is a beautiful instrument, invented in Italy in the 1700s by Bartolomeo Cristofori.
0_Apprentice
How many keys does a piano have?
1_Wizard
A piano has 88 keys, which are essentially small levers which you press down on and cause the little hammers inside to strike the strings.