A piece of iron wire 5.2 meters long encloses a square, what is its area?
一段长5.2米的铁丝围成一个正方形，它的面积是多少？
<gadget id="calculator">5.2 / 4</gadget>
<output>1.3</output>

<gadget id="calculator">1.3 * 1.3</gadget>
<output>1.69</output>

<result>1.69</result>