Xiaohua measured the circumference of the top of a tree stump to be about 125.6 cm. What is the area of the cross-section of the trunk of this tree?
小华量得一个树桩顶部的周长约是125.6厘米．这棵树树干的横截面的面积是多少？
<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>