Simplify the following text for a Grade 8 native English-speaking person.
Original: Casio Computer Co. , Ltd. is a multinational electronic devices manufacturing company founded in 1946 , with its headquarters in Shibuya , Tokyo , Japan . Casio is best known for its calculators , audio equipment , PDAs , cameras , musical instruments , and watches .
Simplified: Casio is a company whose headquarters are in Tokyo , Japan .