The circumference of a circular iron sheet is 125.6 cm, what is its area in square centimeters?
一块圆形铁皮的周长是125.6厘米，它的面积是多少平方厘米．
<gadget id="calculator">125.6 / 2 / 3.14</gadget>
<output>20</output>

<gadget id="calculator">20 ** 2</gadget>
<output>400</output>

<gadget id="calculator">3.14 * 400</gadget>
<output>1_256</output>

<result>1_256</result>