cylinder has a side area of 188.4 square centimeters and a base diameter of 8 centimeters. What is its height in centimeters?
一个圆柱的侧面积是188.4平方厘米，底面直径是8厘米，它的高是多少厘米．
<gadget id="calculator">3.14 * 8</gadget>
<output>25.12</output>

<gadget id="calculator">188.4 / 25.12</gadget>
<output>7.5</output>

<result>7.5</result>