How can I defeat this ravenous Bugblatter Beast of Traal

Hint 1 of 9:

As always, consult the HHGG, and DON'T PANIC!

Hint 2 of 9:

Did you bring the gun from the box in the Heart of Gold?

Hint 3 of 9:

It's not a very good gun, is it?

Hint 4 of 9:

Reveal you name to the beast (if you can still remember).

Hint 5 of 9:

Head east to avoid being eaten immediately.

Hint 6 of 9:

Get the stones on the ground.

Hint 7 of 9:

Now, how stupid was this beast? (Hope you have your traveling kit.)