7 students from class 6 and 1 had a table tennis competition. If there is a competition between every two students, how many games should be arranged in total?
六1班的7名同学进行乒乓球比赛．如果每两名同学之间要进行一场比赛，一共要安排多少场比赛．
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 * (1/3)</gadget>
<output>2</output>

<gadget id="calculator">42 / 2</gadget>
<output>21</output>

<result>21</result>