A cylinder has a lateral area of 113.4 square decimeters and a base diameter of 4 decimeters. What is its height in decimeters.
一个圆柱体的侧面积是113.4平方分米，底面直径是4分米．它的高是多少分米．
<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">113.04 / 12.56</gadget>
<output>9</output>

<result>9</result>