Smarty operation in Prestashop 1.7 - prestashop

Question

I'm trying to do in Prestashop 1.7 math operation between two smarty variables inside product-discounts.tpl but result is wrong...
{$product.regular_price}
[output: 12,85 €]
{$quantity_discount.discount}
[output: 9.8%]
{$product.regular_price*$quantity_discount.discount}
[output: 117,6] Should be: 12.85*9.8= 125.93
Any idea?
I've tryed:
{$product.regular_price|floatval}
[output:12] Should be: 12.85
Thanks in advance
Prestashop 1.7

Answer 1

Actually, this is happening because of comma in price 12,85 €, so, if you replace the comma with dot then you will get a correct value 125.93
I think the easiest solution would be by assigning a new variable in tpl file and replace the comma from the regular_price 12,85 with a dot.
By the way, you could also replace comma with dots from the controller but if you want to perform mathematical operations within the template file you could do it like this:
Firstly, assign {$product.regular_price} to regularPrice variable along with replacing comma with dot, something like this:
{assign var=regularPrice value=$product.regular_price|replace:',':'.'}
I hope $quantity_discount.discount always contains dot but if there is also a comma instead of dot then,
{assign var=quantityDiscount value=$quantity_discount.discount|replace:',':'.'}
and, last thing you have to do is multiple both variables regularPrice and quantityDiscount with each other
{assign var=total_price value=$regularPrice * $quantityDiscount}
then display total_price in tpl file like this:
{$total_price}

Answer 2

You can use the following
{$product.regular_price_amount*$quantity_discount.discount}
regular_price is used for price display.
If you want to do some mathematical calculation then you can use the regular_price_amount value of the product.