In the Asian Cup football match, China, Qatar, North Korea, and Kuwait are divided into Group A. Every 2 teams will play one game. How many games will they play in total?
亚洲杯足球赛，中国、卡塔尔、朝鲜、科威特分在A组，每2个球队踢一场，一共要踢多少场．
<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>