Re: OT: Converting miles/km

J. J. Lodder wrote:

Christian Weisgerber <naddy@mips.inka.de> wrote:
 

On 2024-09-19, Christian Weisgerber <naddy@mips.inka.de> wrote:
>

Yes, the natural logrithm of 5 approximates the conversion factor
between miles and kilometers; specifically one mile is about ln(5)
kilometers.

>
PS:
>
"The Maritime Approximation"
https://xkcd.com/3023/
>
   pi mph = e knots

 Why would a sailor, or a pilot, want to know about miles?

Being born on land a sailor or a pilot would no doubt
become first acquainted with m (or km).

There is of course no need to drag time into it.
It can be simplified to pi landlubber miles
equals e seaman miles,

Cute, but simpler still
pi landlubber miles equals e 1.2*miles