Here's a breakdown:
* Our Sun: The Sun's diameter is about 109 times the Earth's diameter. So, you could fit roughly 109 Earths across the Sun.
* Red Dwarfs: These are the smallest stars, about 10% the size of our Sun. They'd only fit about 10 Earths across.
* Supergiants: These are enormous stars, sometimes thousands of times larger than the Sun. You could fit millions of Earths across a supergiant!
In short, there's no single answer. It depends on the specific star.
