The diameter of the base of a cylinder is 4 decimeters, and the lateral area is 3.14 decimeters squared. What is the height of the cylinder in decimeters?
一个圆柱的底面直径是4分米，侧面积是3.14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">3.14 / 12.56</gadget>
<output>0.25</output>

<result>0.25</result>