Eight students in the sixth grade participate in a table tennis competition. If every two students play a game, how many games will be played in total?
六年级8名同学参加乒乓球比赛，如果每两名同学之间都进行一场比赛，一共要进行多少场．
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<result>28</result>