A telegraph pole has a shadow length of 7.5 meters at a certain moment, and a 4-meter-long benchmark pole has a shadow length of 1.2 meters. What is the height of this telegraph pole?
一根电线杆某一时刻测得它的影子长7.5米，同时测得一根长4米的标杆影长为1.2米，这根电线杆的高度是多少米？
<gadget id="calculator">4 * 7.5</gadget>
<output>30</output>

<gadget id="calculator">30 / 1.2</gadget>
<output>25</output>

<result>25</result>