At 4:00 p.m. on a flagpole, the ratio of the length of the flagpole to its shadow on the ground is 3:5, and the length of the known shadow is 12 meters. Find the height of the flagpole?
一根旗杆下午4时，旗杆与其射在地上的影子长度比为3：5，已知影子的长度为12米，求旗杆的高度？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">12 * (3/5)</gadget>
<output>36/5 = around 7.2</output>

<result>36/5 = around 7.2</result>