Conversation so far:
how far away is the asteroid belt from the sun in km
Because the asteroid belt is between the Mars and Jupiter orbits, it is around 2.2 to 3.2 Astronomical Units (AU) from the Sun – which is approximately 329,115,316 to 478,713,186 km.
what is the asteroid belt
The asteroid belt is a torus-shaped region in the Solar System.

Question: where is the belt
Self-contained rewrite: where is the asteroid belt