The base has a radius of 5 cm and a height of 12 cm. Find the surface area of the cylinder.
底面半径是5厘米，高12厘米．求圆柱的表面积．
<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 2</gadget>
<output>157</output>

<gadget id="calculator">3.14 * 5 * 2 * 12</gadget>
<output>376.8</output>

<gadget id="calculator">157 + 376.8</gadget>
<output>533.8</output>

<result>533.8</result>