Custom item Prestashop module

Hi! I work for a small printing company which wants to open a small online shop. Our goal is to offer the users a way to print large banners 100% online. We choosed Prestashop for it, but it doesn't let the user enter custom sizes AND calculate the price. Example: a customer enters on a product page. He enters 2 in height and 3 in weight, and then the price is automatically calculated in base of square meters, in this case let's say it's $10m2, so 2x3x10 = $60 should be the price. Do you think you can do this? Thanks ;)