A section of cylindrical iron water diversion pipe, 1.2 meters long and 0.1 meters in diameter. How many square meters of iron sheets are needed at least for a residential building to have 50 such water diversion pipes?
一节圆柱形铁皮引水管，长1.2米，直径0.1米．某居民楼要做50节这样的引水管，至少需铁皮多少平方米？
<gadget id="calculator">3.14 * 0.1 * 1.2 * 50</gadget>
<output>18.84</output>

<result>18.84</result>