The perimeter of a square is (8/9) meters, what is its area?
一个正方形的周长是(8/9)米，它的面积是多少？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">(8/9) / 4</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) * (2/9)</gadget>
<output>4/81 = around 0.049383</output>

<result>4/81 = around 0.049383</result>