If a cylinder has a base diameter of 2 cm and a height of 3 cm, what is its surface area in square centimeters?
一个圆柱的底面直径是2厘米，高是3厘米，它的表面积是多少平方厘米．
<gadget id="calculator">3.14 * 2 * 3</gadget>
<output>18.84</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 2</gadget>
<output>6.28</output>

<gadget id="calculator">18.84 + 6.28</gadget>
<output>25.12</output>

<result>25.12</result>