A 3-meter-long bamboo pole is erected on the ground, and the length of the shadow is measured to be 1.2 meters. At the same time, the length of the shadow of a flagpole is measured to be 4.8 meters. What is the height of the flagpole in meters?
把3米长的竹竿直立在地面上，测得影长1.2米，同时测得一根旗杆的影长为4.8米，求旗杆的高是多少米？
<gadget id="calculator">3 / 1.2</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 * 4.8</gadget>
<output>12</output>

<result>12</result>