The lateral area of a cylinder is 25.12 square centimeters, the radius of the base is 1 centimeter, what is the height in centimeters.
一个圆柱的侧面积为25.12平方厘米，底面半径1厘米，高是多少厘米．
<gadget id="calculator">2 * 3.14 * 1</gadget>
<output>6.28</output>

<gadget id="calculator">25.12 / 6.28</gadget>
<output>4</output>

<result>4</result>