A cylindrical tin chimney is 1.2 meters long and 0.2 meters in diameter at the bottom. How much iron is needed to make a chimney like this? (overlaps are not considered)
一节圆柱形铁皮烟囱长1.2米，底面直径是0.2米．做一节这样的烟囱需要多少铁皮？(不考虑重叠部分)
<gadget id="calculator">3.14 * 0.2 * 1.2</gadget>
<output>0.7536</output>

<result>0.7536</result>