The worker uncle measured the shadow length of the telegraph pole to be 2 meters, and at the same time measured the shadow length of the meter stick to be 20 centimeters. How tall are the poles?
工人叔叔测得电线杆的影子长是2米，同一时间测得米尺的影长是20厘米．电线杆有多高？
<gadget id="calculator">1 * 100</gadget>
<output>100</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / (1/5)</gadget>
<output>10</output>

<result>10</result>