Please calculate the surface area of the cylinder based on the data provided (unit: cm). (diameter 20, height 25)
请根据提供的数据(单位：cm)，算出圆柱的表面积．(直径20，高25)
<gadget id="calculator">3.14 * 20 * 25</gadget>
<output>1_570</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 * 2</gadget>
<output>628</output>

<gadget id="calculator">1_570 + 628</gadget>
<output>2_198</output>

<result>2_198</result>