Urgent (and probably basic) Math problem for Design work.

Hello

I am a graphic designer who is ridiculously bad at Math.

I need some help with a problem for a 3D piece I'm trying to complete. Its about how long it would take me to drink my body weight in Pepsi Max. (Sounds crazy I know lol). I have a bit of an addiction to it and drink a lot of it...

So...

The 3D piece is 12 stones/rocks - (in the UK we measure our weight in lbs and stones).

I weigh 12 stones, so the stones (or rocks) for my 3D piece represent my weight.

So...

There are 14lbs in a stone.

A 2 litre bottle of Pepsi Max weighs approx 4.5lbs.

I roughly drink 2 litres a day.

I need to know the following...

- How many days based on my approximates it would take me to drink my body weight.

- then I need it divided into 12 because Im writing how long it would take me to drink a stone in weight on each of the rocks. - So I would need to know both how long it would take me to drink my body weight (12 stone) and how long it would take me to drink 1 stone.

I hope this makes sense lol. Thanks to anyone who can help :)

Dan