Okay so I've been hearing for a long time that the reason we get a solar eclipse is because the moon is 400 times smaller than the sun, and 400 times closer to us. Hence it eclipses the sun perfectly in certain locations at times.

Think about it for a minute. You can fit 1.3 million Earths in the sun, so that means the sun is 1.3 million times bigger than the Earth. If the moon is 400 times smaller than the sun, then wouldn't the moon be almost the size of JUPITER??? 400 times smaller is a bullshit number. There's no way that the moon is 400 times smaller than the sun. If it was, it would gravitationally destroy the Earth.

You're right about the phrasing. I've heard these two things before and it's indeed semantic nonsense when you put the two together. The sun in size is 1.3 million Earths but 400 moons? That suggests how many earths in the moon? (yes not the other way around).

Might be worth finding sources that say the two things, canvas them together and showing the lunacy between them.