The radius of the base of a cylinder is 2cm and the height is 10cm, what is its surface area in cm**2.
一个圆柱底面半径是2cm，高是10cm，它的表面积是多少cm**2．
<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>