At 9 o'clock in the morning, the ratio of the height of the flagpole to the length of its shadow is 4:3. Xiao Ming measured that the shadow length of the school flagpole is 16 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4：3，小明测得学校旗杆的影长为16米，那么学校旗杆的实际高度是多少米？
<gadget id="calculator">4 * 16</gadget>
<output>64</output>

<gadget id="calculator">64 / 3</gadget>
<output>64/3 = around 21.333333</output>

<result>64/3 = around 21.333333</result>