Showing prices without EU VAT.

[Rodland]

I'm looking for a quick way to show a price with and without VAT.

 

For instance:

 

?245.00 Incl.VAT (?208.51 excl. VAT for our non-EU customers)

 

the ?208.51 shown above is calculated simply by taking the price (including vat) and multiplying by .8511

 

How can I do this to the below?

 

<?php echo $products_price; ?>

 

Something like this?

 

<?php echo $products_price*.8511; ?>

 

Or...

 

<?php echo $products_price; ?*.8511>

 

As you can imagine I've tried the above and it doesn't work. Any tips????