If a 9.42-meter circular protective fence is built around the banyan tree in Jintou, what is the area enclosed by the fence?
如果给津头的榕树围上一圈9.42米的圆形保护栏，求此栏围了多大的面积？
<gadget id="calculator">9.42 / 3.14 / 2</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">3.14 * 2.25</gadget>
<output>7.065</output>

<result>7.065</result>