The measurement team measured the shadow length of a chimney to be 2.4 meters. At the same time, a bamboo pole with a length of 20 decimeters was erected on the ground, and the shadow length of the bamboo pole was measured to be 16 decimeters. What is the height of the chimney? (Answer with proportional knowledge)
测量小组测得一烟囱的影长是2.4米，同时把20分米长的竹竿立在地上，测得竹竿的影长16分米．烟囱的高是多少米？(用比例知识解答)
<gadget id="calculator">20 / 16</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) * 2.4</gadget>
<output>3</output>

<result>3</result>