Can you calculate the number...

A man went to his dentist because he feels something wrong in his mouth. The dentist examines him and says, "That new upper plate I put in for you six months ago is eroding. What have you been eating?" The man replies, "All I can think of is that about four months ago my wife made some asparagus and put some stuff on it that was delicious - Hollandaise sauce. I loved it so much I now put it on everything --meat, toast, fish, vegtables, everything." "Well," says the dentist, "that's probably the problem. Hollandaise sauce is made with lots of lemon juice, which is highly corrosive. It's eaten away your upper plate. I'll make you a new plate, and this time use chrome." "Why chrome?" asks the patient. To which the dentist replies, "It's simple. Everyone knows that there's no plate like chrome for the Hollandaise!"