Make a cylindrical chimney pipe with a length of 1 meter and a base radius of 6 cm. At least how many square centimeters are needed.
做1节长1米、底面半径为6厘米的圆柱形烟囱管．至少需要多少平方厘米．
<gadget id="calculator">3.14 * 6 * 2 * 1 * 100</gadget>
<output>3_768</output>

<result>3_768</result>