If two adjacent students do exercises with a distance of 2 meters and a row of 18 meters, how many students are there in total?
如果相邻两个同学相隔2米排成长18米一排的队伍做操，那么一共有多少个同学．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 + 1</gadget>
<output>10</output>

<result>10</result>