Xiaodong measured that the circumference of the thickest part of the trunk of a tree is 125.6 cm. What is the area of the cross-section at the thickest part of the trunk?
小东量得一棵树的树干最粗处的周长是125.6cm，该树干最粗处横截面的面积是多少？
<gadget id="calculator">125.6 / 3.14 / 2</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>