What is the surface area of a cylinder with a base radius of 2 cm and a height of 10 cm?
一个底面半径2cm，高10cm的圆柱的表面积是多少平方厘米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">2 * 3.14 * 2 * 10</gadget>
<output>125.6</output>

<gadget id="calculator">25.12 + 125.6</gadget>
<output>150.72</output>

<result>150.72</result>