factory has produced 100 boxes of canned lunches. It is known that the bottom of the cans is 10 cm in diameter and 6 cm in height. How much paper is needed if labels are attached (excluding overlapping parts)?
某厂生产了100盒午餐罐头，已知罐头底面直径10厘米，高6厘米．如果贴上标签纸(重叠部分不计)，一共需要多少纸？
<gadget id="calculator">3.14 * 10 * 6 * 100</gadget>
<output>18_840</output>

<result>18_840</result>