A conveyer belt sushi restaurant lets you choose what to eat from different coloured plates that go by. You pay based on the colours of the plates.

After dinner, Claire has 3 red plates 2 yellow plates 1 green plate and 3 blue plates. How many ways can she stack her plates in a single tower?

AAAaannndd the bot gets it wrong yet again!

9!/(3!2!3!) = 5040

There are 720 possible ways to stack Claire's plates in a single tower.