Expand the sides of a cylinder with a height of 18.84 cm to obtain a square. What is the area of the base of the cylinder in square centimeters?
将一个高18.84厘米的圆柱侧面展开，得到一个正方形，圆柱的底面积是多少平方厘米？
<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>