\begin{definition}[Definition:Imperial/Length/Furlong]
The '''furlong''' is an imperial unit of length.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''furlong'''
}}
{{eqn | r = 10
      | c = chains
}}
{{eqn | r = 40
      | c = rods, poles or perches
}}
{{eqn | r = 220
      | c = yards
}}
{{eqn | r = 660
      | c = feet
}}
{{eqn | r = 201 \cdotp 168
      | c = metres
}}
{{end-eqn}}
\end{definition}