The lateral area of a cylinder is 12.56cm**2, the radius of the bottom is 2cm, what is its height in cm?
一个圆柱的侧面积是12.56cm**2，底面半径是2cm，它的高是多少cm．
<gadget id="calculator">3.14 * 2 * 2</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 12.56</gadget>
<output>1</output>

<result>1</result>