8 students are playing a chess match, if every two players play one game, how many games will there be in total?
8名同学进行象棋比赛，如果每两人赛一场，一共要赛多少场．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

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

<result>28</result>