The 19th FIFA World Cup was held in South Africa, with 32 teams divided into 8 groups. South Africa, Mexico, Uruguay and France are divided into Group A. Every two teams in the group will play one game. How many games will each group play?
第19届世界杯足球赛在南非举行，共有32支球队，分成8个小组比赛．南非、墨西哥、乌拉圭和法国分到了A组，小组内每两支球队进行一场比赛，每组要进行几场比赛？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

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

<result>6</result>