If the height of a cylinder is reduced by 4 cm, the surface area will decrease by 50.24 cm2. The area of the base of this cylinder is _____ cm2. (π takes 3.14)
一个圆柱体，高减少4厘米，表面积就减少50.24平方厘米，这个圆柱的底面积是_____平方厘米．(π取3.14)
<gadget id="calculator">50.24 / 4 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<result>12.56</result>