Xiao Ming sat in the train and looked at the electric poles outside. It took half a minute from the 1st to the 16th. If the speed of the train is 72 kilometers per hour, how many meters are there between every two poles?
小明坐在火车里看外面的电线杆．从第1根到第16根共花了半分钟．如果火车时速为72千米，每两根电线杆相距多少米？
<gadget id="calculator">16 - 1</gadget>
<output>15</output>

<gadget id="calculator">20 / 15</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">30 * (4/3)</gadget>
<output>40</output>

<result>40</result>