Good sheets stone weight on graphs

Hey, I'm looking for someone to help me make a graph which shows weight in stone.

So 1 stone is 14 pounds.

That means it's really hard to do in google sheets cos it's base 10.

Let's say someone weighs 10 stone 12 lbs, that would be incorrectly seen as 11.2.

Does anyone know a way around this?

Plus also to display it on a graph.

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