How did you end up with 211?

Maybe I'm wrong but how I did :

221 periods of 23 hours
Means for 24 hours it is missing 1 hour
221 x 1 = 221
221 / 24 = 9.20

So around 9 days
221 + 9 = 230 days

Correct if I'm wrong, maybe too much beers =D