Simplify the following text for a Grade 7 native English-speaking person.
Original: Headquartered in Tehran , Iran , the Islamic Azad University was founded in 1982 and currently has an enrollment of 1.5 million students , making it the world 's third largest .
Simplified: Islamic Azad University was founded in 1982 and has an enrollment of 1.5 million students , making it the world 's third largest .