Use a 25.12-meter-long fence to form the largest duck fence on one side close to the small river. What is the area of the duck fence in square meters?
用一块长25.12米的篱笆，一面紧靠小河边围成一个最大的鸭栏，这个鸭栏的面积是多少平方米？
<gadget id="calculator">25.12 / 3.14</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">64 / 2</gadget>
<output>32</output>

<gadget id="calculator">3.14 * 32</gadget>
<output>100.48</output>

<result>100.48</result>