An Eighth of a Mile or 201.168 Metres
Puzzle 6 of Ancient China Hard Pack
Question is: An Eighth of a Mile or 201.168 Metres
and the answer is: FURLONG
Word Meaning:
FURLONG — A unit of distance equal to one-eighth of a mile (220 yards, or 201.168 metres), now mainly used in measuring distances in farmland and horse racing.
Definitions from Wiktionary.