Xiao Ming sat on the train and counted the telephone poles outside. It took a total of 1 minute to count from the first to the 31st. If the train travels 72km per hour, how many meters are there between every two adjacent poles?
小明坐在火车里数外面的电线杆，从第1根数到第31根共花了1分钟．如果火车每小时行72km，那么每相邻两根电线杆相隔多少米？
<gadget id="calculator">31 - 1</gadget>
<output>30</output>

<gadget id="calculator">20 / 30</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 * 60 * (2/3)</gadget>
<output>40</output>

<result>40</result>