A cube with an edge length of 20 cm is cut into the largest cylinder. What is the surface area of this cylinder in square centimeters?
一个正方体棱长20厘米，把它削成一个最大的圆柱，这个圆柱的表面积是多少平方厘米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">3.14 * 100 * 2</gadget>
<output>628</output>

<gadget id="calculator">3.14 * 20 * 20</gadget>
<output>1_256</output>

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

<result>1_884</result>