The surface area of a cylinder is equal to the area of the rectangle. It is known that the area of the rectangle is 251.2 square centimeters. The radius of the base of the cylinder is 2 centimeters. What is the height of the cylinder in centimeters?
一个圆柱的表面积和长方形的面积相等，已知长方形的面积是251.2平方厘米，圆柱的底面半径是2厘米，圆柱的高是多少厘米？
<gadget id="calculator">251.2 - 25.12</gadget>
<output>226.08</output>

<gadget id="calculator">226.08 / 12.56</gadget>
<output>18</output>

<result>18</result>