The 2014 World Cup will be held in Brazil. There are four teams in each group, and there is one game between every two teams. How many games are there in each group?
2014年世界杯将在巴西举行，每个小组有四支球队，每两支球队之间要比赛一场，那么每小组中一共有多少场比赛．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 * (3/2)</gadget>
<output>6</output>

<result>6</result>