A cylinder has a base diameter of 4 decimeters and a side area of 25.12 square decimeters. What is the height of the cylinder in decimeters?
一个圆柱的底面直径4分米，侧面积是25.12平方分米，这个圆柱的高是多少分米．
<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">25.12 / 12.56</gadget>
<output>2</output>

<result>2</result>