Regarding Price multiplication

[lakha]

Hello,

 

i have my client store 

 

now i entered 27 in my product price field

 

and unit price is 1.86

 

now what i want

 

when some want to add that product from front end then i want to multiplication of product price and unitprice when customer add it

 

but currently its multiply by price * quantity

 

i need it Price * unit_price * quantity

 

its possible or not if yes then how can i do modification in that

 

i check product.tpl and productcontroller.php file but i didn't get any thing

 

thanks