After unfolding the side of a cylinder, it is a square with a side length of 18.84dm. What is the area of the base of this cylinder dm**2.
把一个圆柱的侧面展开后是一个边长18.84dm的正方形．这个圆柱的底面积是多少dm**2．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>