Use a thin rope 18.84 decimeters to wrap around a tree exactly 3 times, and saw off the tree at the place where it is wound. Find the cross-sectional area of the broken part of the tree?
用18.84分米长的细绳在一棵树下刚好绕了3圈，沿绕的地方把树锯断，求这棵树断处的横截面积？
<gadget id="calculator">18.84 / 3 / 3.14 / 2</gadget>
<output>1</output>

<result>1</result>