There are 4 table tennis teams, and each team plays a game with the other three teams. How many games can they play in total?
有4个乒乓球队，每队都与其他三个队打一场球，一共可打多少场球．
<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>