A cylinder has a base circumference of 18.84 meters and a height of 3 meters. What is its surface area in square meters?
一个圆柱的底面周长是18.84米，高是3米．它的表面积是多少平方米？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">18.84 * 3</gadget>
<output>56.52</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2</gadget>
<output>56.52</output>

<gadget id="calculator">56.52 + 56.52</gadget>
<output>113.04</output>

<result>113.04</result>