How many keys are in a standard piano?
There are 88 keys in a standard piano. It has been the standard since Steinway built their pianos in the 1880s. There are 52 white keys and 36 black keys.
Instruction: How many keys are in a standard piano?
Context: 
Response: There are 88 keys in a standard piano. It has been the standard since Steinway built their pianos in the 1880s. There are 52 white keys and 36 black keys.