A cylinder has a base diameter of 20 cm and a surface area of 942 cm2. What is the height of this cylinder in centimeters.
一个圆柱的底面直径是20厘米，表面积是942平方厘米．这个圆柱的高是多少厘米．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 2</gadget>
<output>628</output>

<gadget id="calculator">942 - 628</gadget>
<output>314</output>

<gadget id="calculator">314 / 3.14 / 20</gadget>
<output>5</output>

<result>5</result>