\begin{definition}[Definition:Imperial/Area/Square Yard]
The '''square yard''' is an imperial unit of area.
One '''square yard''' is equal to a square of side $1$ yard in length.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''square yard'''
}}
{{eqn | r = 9 = 3^2
      | c = square feet
}}
{{eqn | r = 1296 = 36^2
      | c = square inches
}}
{{end-eqn}}
\end{definition}