Xiao Ming took the test six times, and the average score of the third and fourth tests was 2 points higher than the average score of the previous two tests, and 2 points lower than the average score of the last two tests. If the average score of the last three times is 3 points more than the average score of the first three times, how much more is the fourth time than the third time?
小明参加了六次测验，第三、第四次的平均分比前两次的平均分多2分，比后两次的平均分少2分．如果后三次平均分比前三次平均分多3分，那么第四次比第三次多得几分？
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<gadget id="calculator">9 - 8</gadget>
<output>1</output>

<result>1</result>