A cylinder has a side area of 188.4 square decimeters and a base radius of 2 decimeters. What is its height in centimeters?
一个圆柱侧面积188.4平方分米，底面半径2分米，它的高是多少厘米．
<gadget id="calculator">3.14 * 2 * 2</gadget>
<output>12.56</output>

<gadget id="calculator">188.4 / 12.56</gadget>
<output>15</output>

<result>15</result>