The 4 teams in the World Cup group stage play a single round-robin match. The winner of each game will get 3 points, the draw will get 1 point, and the loser will get 0 points. What is the difference between the highest possible scores for the eliminated teams?
世界杯小组赛4支球队进行单循环赛，每场胜者积3分，平局各积1分，负者积0分，前两名出线，后两名出局，那么出现队伍可能得到的最低分和出局队伍可能得到的最高分之间相差多少？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">3 * 4 * (3/2)</gadget>
<output>18</output>

<gadget id="calculator">2 * 4 * (3/2)</gadget>
<output>12</output>

<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<result>6</result>