User blog comment:IamJakuhoRaikoben/Chapter 383: Surfer Lucy, Review./@comment-24748439-20140510013721/@comment-7418318-20140511083119

Oh wait I just noticed that I have made a stupid mistake. I calculated one day with 24 minutes instead of 24 hours ... doh.

That means your 7.5 hours for a five minutes were correct.

Note to self: Don't make calculations right after getting out of bed.