If the length of the trunk of a big tree is measured to be 18.84 decimeters, how many decimeters is the diameter of this big tree?
测量一棵大树树干一周的长度是18.84分米，这棵大树的直径是多少分米？
<gadget id="calculator">18.84 / 3.14</gadget>
<output>6</output>

<result>6</result>