Xiaohong made a cylindrical pen holder with a bottom radius of 6cm and a height of 14cm. She wants to paste colored paper on the surface of the pen holder. How much colored paper does she need at least?
小红做了一个圆柱形笔筒，底面半径6cm，高是14cm，她要给笔筒的表面贴上彩纸，至少需要多少彩纸？
<gadget id="calculator">3.14 * 6 * 2 * 14</gadget>
<output>527.52</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<gadget id="calculator">527.52 + 113.04</gadget>
<output>640.56</output>

<result>640.56</result>