The circumference of the base of the cylinder is 21.98 cm and the height is 10 cm. What is its surface area?
圆柱的底面周长是21.98厘米，高是10厘米，它的表面积是多少．
<gadget id="calculator">21.98 * 10</gadget>
<output>219.8</output>

<gadget id="calculator">21.98 / 3.14 / 2</gadget>
<output>3.5</output>

<gadget id="calculator">3.5 ** 2</gadget>
<output>12.25</output>

<gadget id="calculator">3.14 * 12.25 * 2</gadget>
<output>76.93</output>

<gadget id="calculator">219.8 + 76.93</gadget>
<output>296.73</output>

<result>296.73</result>