Yeah... I’ve never heard that outside of memes. To remember how many feet in a mile you just have to... remember 5280. It’s a 4 digit number. Monkeys can remember 6-7 digit numbers. Or... don’t remember it. 99.9% of people will never have any use for how many feet are in a mile or the meters in a kilometer. Knowing how long it takes to travel a mile is generally all most people can use. But when will you need to convert miles to feet? “Oh damn. This recipe calls for 1 Mile of bananas and feeds 4000, but I only want to feed 5....” If you need to know how many feet are in a mile you probably know.
We just use fractions. If you know how long it takes to drive a mile or walk a mile or whatever- if something is a quarter mile away... it takes 1/4 the time. But... it doesn’t even matter- because most of the time no one anywhere near where I live cares what distance something is. If you head south at 5pm today you can go 20 Miles in about an hour. If you head north it will be about 1.5 hours to go 20 Miles- and if you head east- 20 Miles can take 2 hours. So people usually just refer to things by TIME as in “its 20 minutes from here...” Why do you car how far it is? The thing that matters is your time isn’t it? And the time it takes to travel a distance depends on other factors not just the distance.
it doesnt even work ;)