If a cube with an edge length of 20 cm is processed into the largest cylinder, what is the surface area of this cylinder in square centimeters?
把一个棱长为20cm的正方体木块加工成一个最大的圆柱，这个圆柱的表面积是多少平方厘米？
<gadget id="calculator">3.14 * 20 * 20</gadget>
<output>1_256</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">314 * 2</gadget>
<output>628</output>

<gadget id="calculator">1_256 + 628</gadget>
<output>1_884</output>

<result>1_884</result>