There are 8 teachers in a school playing chess. If every 2 teachers play a game, how many games will there be in total?
学校有8名教师进行象棋比赛，如果每2名教师之间都进行一场比赛，一共要比赛多少场．
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<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>