In the 2006 World Cup, the list of the top four teams is as follows: Italy, Germany, France, Portugal, every two teams will play one game, how many games will they play in total? how many games
2006年世界杯，四强球队名单如下：意大利、德国、法国、葡萄牙，每两队踢一场，一共要踢多少场？多少场
<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>