At 9 o'clock in the morning, the ratio of the height of the flagpole to the length of its shadow is 5:4. Xiao Ming measured that the shadow length of the school flagpole is 12 meters, so how many meters is the actual height of the school flagpole?
早上9点钟时，旗杆的高度与它的影子的长度比是5：4，小明测得学校旗杆的影长为12米，那么学校旗杆的实际高度是多少米？
<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<result>15</result>