cylinder, the side view is a square, its side length is 18.84 cm, what is the radius of its base in cm.
一个圆柱体，侧面展开图是正方形，它的边长是18.84厘米，它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>