The diameter of a circular fountain in the center of the square is 12 meters. How many square meters does it cover?
街心广场中心一圆形喷水池直径是12米，它的占地面积是多少平方米？
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<result>113.04</result>