The sum of the circumference and diameter of a circle is 20.7 meters, what is the area of the circle in square meters? (π takes 3.14)
一个圆的周长和直径相加的和是20.7米，这个圆的面积是多少平方米？(π取3.14)
<gadget id="calculator">20.7 / 4.14</gadget>
<output>5</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) ** 2</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">3.14 * (25/4)</gadget>
<output>19.625</output>

<result>19.625</result>