Xiaoya made a cylindrical pen container with a bottom diameter of 8 cm and a height of 13 cm. She wanted to paste colored paper around the pen container. How many square centimeters of colored paper would she need at least?
小亚做了一个底面直径是8厘米、高13厘米的圆柱形笔筒，她想在笔筒的四周贴上彩纸，至少需要多少平方厘米彩纸？
<gadget id="calculator">3.14 * 8 * 13</gadget>
<output>326.56</output>

<result>326.56</result>