On Teacher's Day, a potted flower is placed every 2 meters on both sides of the avenue at the school gate, and there are 62 potted flowers in total. How many meters is the avenue at the school gate?
教师节校门口大道两旁每隔2米摆1盆花，共摆了62盆花，那么校门口大道有多少米长？
<gadget id="calculator">62 / 2</gadget>
<output>31</output>

<gadget id="calculator">31 - 1</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>