How do balance this equation? How do I figure out the the composition of the product?

Balance an equation for the reaction that occurs when two liters of ethane, c2h6, react completely with fourteen liters of fluorine, to form sixteen liters of products. All reactants and products are gases, and all volumes are measured at 25 C and 1 atm. Thanks.|||2 C2H6 + 14 F2 = 2 C2F6 + 12 HF + 2 F2