In case you're wondering...
I'm pulling your chain to make a point, here.
I don't recalculate things I can look up. That number can be found in countless references. On the other hand, if every source had a different number, or there was some reason to doubt the references, I'd pull out my own calculator.
The math is beside the point, here. It isn't necessary to do math to decide the issue.
Johannes serves as a spectacular example of letting calculation overtake simple reason. It's how things like Zeno's Paradox are developed.