The lateral area of a cylinder is 12.56 square centimeters, and the radius of the base is 2 decimeters. What is its height in centimeters?
一个圆柱体的侧面积是12.56平方厘米，底面半径是2分米，它的高是多少厘米．
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">2 * 3.14 * 20</gadget>
<output>125.6</output>

<gadget id="calculator">12.56 / 125.6</gadget>
<output>0.1</output>

<result>0.1</result>