Einstein's Theory of Lost Paper

E=mc2  -  -  -  Elsa, milk and 2 cookies or 3?

"Mine pretty Liebchen Elsa, haf you perhaps found a leetle piece of paper mit writing on it? Maybe mit E=mc3 or 4 or 8 on it? I seem to have lost der scrap."

"Albert, you know I stay out of there since I erased your blackboard that time and you said I caused an eclipse.  The note I found only said E=MC something so I brought you milk and cookies how you like.  Maybe you meant More Chalk, I don't know. But if you had not eaten them zo fast mein Grandpapa, ve could count zem to see vhat your note said."

Al