Master Wang covers a circular wellhead with a circular canvas. The diameter of the wellhead is 1.8 meters, and the diameter of the canvas is 0.2 meters larger than the diameter of the wellhead. What is the area of the canvas?
王师傅给一个圆形的井口遮上一块圆形帆布，井口的直径是1.8米，帆布的直径要比井口的直径多0.2米，这块帆布的面积是多少？
<gadget id="calculator">1.8 + 0.2</gadget>
<output>2</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<result>3.14</result>