Ron blinked, and then beamed at Hermione, grinning ear to ear. "That's brilliant! You're brilliant. I knew that if anyone could work that out, it would be you."
He was briefly interrupted as their server came to take their orders, but then continued his string of compliments. "Bloody hell, Hermione. That's just... brilliant." He really needed another word. "So do you feel better, with that worked out?"