The sides of a cylinder are expanded to form a square. The height of the cylinder is 94.2 cm. What is the radius of the base of the cylinder in cm?
一个圆柱的侧面展开后是一个正方形，圆柱的高是94.2厘米，圆柱的底面半径是多少厘米．
<gadget id="calculator">94.2 / 3.14 / 2</gadget>
<output>15</output>

<result>15</result>