Simplify the following text for a Grade 7 native English-speaking person.
Original: The Sun 's distance from the Earth is about 400 times the Moon 's distance , and the Sun 's diameter is about 400 times the Moon 's diameter .
Simplified: The Sun 's distance from the Earth is about 400 times the Moon 's distance , and the Sun 's diameter is about 400 times as big as the Moon 's .