Dad wants to use an iron sheet with an area of 282.6dm**2 to make a ventilation pipe with a bottom diameter of 1.5dm. What is the longest ventilation pipe?
爸爸要用一块面积为282.6dm**2的铁皮，做一个底面直径为1.5dm的通风管，所做的通风管最长是多少？
<gadget id="calculator">3.14 * 1.5</gadget>
<output>4.71</output>

<gadget id="calculator">282.6 / 4.71</gadget>
<output>60</output>

<result>60</result>