So when someone says "that city" is 12 km west of "this city", we are suppose to go "oh so its 1,200,000 cm to the west." Sorry but that is meaningless. Easier to conceptualize it as about 7 miles and not 1,200,000 cm. no... you'd be think of it as 12kilometers... just as you wont think the 7miles as 443425inches