In the 2008 Beijing Olympic Games, the Chinese men's football team consisted of 4 teams in Group C. How many games will each two teams have to play?
2008年北京奥运会中，中国男足分在的C组共有4个队．每两个队要比赛一场，共要赛多少场．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">4 * 1 * (3/2)</gadget>
<output>6</output>

<result>6</result>