Li Xiang measured with a ruler that the circumference of the trunk of a tree is 12.56 decimeters, so how many decimeters is the radius of the cross section of the trunk of this tree?
李响用尺量得一棵树的树干的周长是12.56分米，则这棵树的树干的横截面的半径是多少分米？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<result>2</result>