If the height of a cylinder increases by 2cm, the surface area increases by 50.24**2. What is the area of the base of this cylinder in square centimeters?
一个圆柱的高增加2cm，表面积就增加50.24**2．这个圆柱的底面积是多少平方厘米？
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<result>50.24</result>