It is known that the radius of the base of the cylinder is 2 cm, and the side area is 62.8 cm2, so what is its height in cm?
已知圆柱的底面半径是2厘米，侧面积是62.8平方厘米，则它的高是多少厘米．
<gadget id="calculator">62.8 / 3.14 / 2 / 2</gadget>
<output>5</output>

<result>5</result>