What can 1,800 pounds of butter; 2,925 pounds of brown sugar; 7,200 eggs; 7,200 pounds of all-purpose flour; 1,080 ounces of ginger; and a few other ingredients create? A giant gingerbread house, that’s what. The 21-foot high house, which was built in 2013 to help raise money for a trauma center, covered an area about…