What is the area of a square with a perimeter of 24 decimeters?
一个周长24分米的正方形，它的面积是多少平方分米．
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<result>36</result>