In the practical activity class, Xiaogang erected a 2-meter-long wooden stick beside the school flagpole, and measured the shadow length of the wooden stick to be 1.2 meters; at the same time, the shadow length of the flagpole was measured to be 3 meters. What is the height of the school flagpole? (Solution by proportional method)
实践活动课上小刚在学校旗杆边立一根2米长的木条，量得木条的影长1.2米；同时量得旗杆的影长为3米．学校旗杆的高度是多少米？(用比例方法解)
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 / 1.2</gadget>
<output>5</output>

<result>5</result>