Narcissa nodded as she put the celery and the lettuce into the trolley. "You made a perfect null-field. You want to grow our own food, I completely support you in this." She turned to her mother-in-law. "I, like most purebloods, lived in the magical world all our lives and were never exposed to... frappuccinos or using plastic cards in place of Galleons. Hermione here though was able to pull off advanced theoretical magic on the post-graduate level, proving that you don't have to be born and raised in it to understand it. It just takes a bit of adjustment."