Total quantity calculator

Hi,
i want to ask if WooCommerce itself or some plugin can create a total quantity calculator. Basically we have website for selling epdm membrane for flat roofs. We want something like this: Customer will choose in one field what lenght he wants x (times) specific width and below will be displayed whole amount in m2 (meter square). And that whole amount in m2 will be multiplied by the price of that specific product. I will be greatfull for any tips.