A 3.808-meter-long iron wire forms a ring with a total length of 4 cm at the joints. What is the area of the ring in square centimeters?
把一根长3.808米的铁丝围成一个圆环，接头处共长4厘米，这个圆环的面积是多少平方厘米？
<gadget id="calculator">3.808 * 100</gadget>
<output>380.8</output>

<gadget id="calculator">380.8 - 4</gadget>
<output>376.8</output>

<gadget id="calculator">376.8 / 3.14 / 2</gadget>
<output>60</output>

<gadget id="calculator">60 ** 2</gadget>
<output>3_600</output>

<gadget id="calculator">3.14 * 3_600</gadget>
<output>11_304</output>

<result>11_304</result>