Significant figures, you have too many of them.

13,397 feet

14,000 feet. Sorry to nitpick! You go with the min of the sigfigs in the expression, which here is 2 = sigfigs(12) < sigfigs(13,397.28) = 7

Ha, don't worry about it.

I was thinking it was the significant digits after the decimal. It's always been my weakness calculation-wise.

How about 14E3 feet? :P

much better!

Or 1.4E4 to put it in proper scientific notation.