When I drove thru Mexico first time a long time ago I was always looking at signs with distances to towns in km and multiplying by 5 and diving by 8 to figure out mph to figure out my eta based on my mph. And then it dawned on me all i had to do was look at the km/h marks on my speedometer duh!

all you guys who want to measure in 64th's go for it. I like 10's anymore