Bridgette and Alex are getting married. Bridgette is inviting 84 guests, and Alex is inviting two thirds of that number of guests. They hired a caterer to make a plated meal for each guest at the wedding reception. The caterer always makes ten extra plates just in case something goes wrong. Each plate of steak and asparagus in garlic butter will have 8 asparagus spears on it. How many asparagus spears will the caterer need in all?