A rope is 12.56 meters long and wraps exactly 10 times around the trunk. What is the approximate diameter of the trunk cross section in centimeters?
一根绳子长12.56米，正好绕树干10圈，树干横截面的直径大约是多少厘米？
<gadget id="calculator">12.56 * 100</gadget>
<output>1_256</output>

<gadget id="calculator">1_256 / 10 / 3.14</gadget>
<output>40</output>

<result>40</result>