The length of the iron wire is (4/5) meters, and the largest square is surrounded by it. What is the area in square meters?
铁丝长(4/5)米，用它围成一个最大的正方形，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>