How many square decimeters of advertising paper are needed to pack 100 cylindrical barrels with a bottom diameter of 5 cm and a height of 11 cm? (Retain integers)
要包装100个底面直径是5厘米，高是11厘米的圆柱形桶的侧面，至少需要多少平方分米的广告纸？(得数保留整数)
<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 5 * 11 * 1</gadget>
<output>172.7</output>

<result>172.7</result>