A square is surrounded by a (4/5) meter long iron wire. What is the area of this square in square meters?
用一根长(4/5)米的铁丝围成一个正方形，这个正方形的面积是多少平方米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 4</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (1/5)</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>