There are 8 children playing games on the playground, which is 2/7 of the total number of people participating in the activities on the playground. How many people are participating in the activities on the playground?
操场上玩游戏的小朋友有8人，是操场上参加活动总人数的(2/7)，操场上有多少人参加活动？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">8 / (2/7)</gadget>
<output>28</output>

<result>28</result>