You are to fix dinners for 400 people at a convention of Mexican food fans. Your recipe calls for 2 jalapeno peppers per serving (one serving per person). However, you have only habanero peppers on hand. The spiciness of peppers is measured in terms of the scoville heat unit (SHU). On average, one jalapeno pepper has a spiciness of 4000 SHU and one habanero pepper has a spiciness of 300 000 SHU. To get the desired spiciness, how many habanero peppers should you substitute for the jalapeno peppers in the recipe for the 400 dinners?