A wire is surrounded to form a rectangle with a length of 4 cm and an area of 8 cm2. If the iron wire encloses a square, what is the area of the square?
把一根铁丝围成一个长方形，长4厘米，面积是8平方厘米．若把这根铁丝围成一个正方形，正方形的面积应是多少？
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6 * (1/2)</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>