A section of iron chimney is 1.2 meters long and 0.2 meters in diameter. To make such a chimney with 150 sections, how many square meters of iron sheet should be used at least?
一节铁皮烟囱长1.2米，直径是0.2米，做这样的烟囱150节，至少要用铁皮多少平方米？
<gadget id="calculator">3.14 * 0.2 * 1.2</gadget>
<output>0.7536</output>

<gadget id="calculator">0.7536 * 150</gadget>
<output>113.04</output>

<result>113.04</result>