The lateral area of a cylinder is 25.12 square decimeters, and the radius of the base is 4 decimeters. What is its height in decimeters?
一个圆柱体的侧面积是25.12平方分米，底面半径是4分米，它的高是多少分米．
<gadget id="calculator">25.12 / 3.14 / 4 / 2</gadget>
<output>1</output>

<result>1</result>