During the military training period, 6 students in a certain dormitory took turns to stand guard and rest at their posts from 9:00 pm to 6:00 am the next day. If there were 2 guard posts and the duration of each guard was the same, each student would rest for a few hours. ?
军训期间，某宿舍6名同学从晚上9点到次日早6点轮流到岗位站岗和休息，若站岗的哨位有2个，每人站岗的持续时间相同，则每位同学休息了几个小时？
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</gadget>
<output>3</output>

<gadget id="calculator">9 - 3</gadget>
<output>6</output>

<result>6</result>