A cylinder is 18.84 centimeters high, and its sides are a square. What is the radius of the base of the cylinder in centimeters?
一个圆柱形，高是18.84厘米，侧面展开是一个正方形，那么这个圆柱形的底面半径是多少厘米．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<result>3</result>