Welcome was tested 3 times. Her second test score was twice that of the first test, and her third test score was three times that of the second test. The average score of the 3 tests is 60 points. What is the score of the second test.
迎迎被测试了3次．她第二次测试成绩是第一次的2倍，第三次测试成绩是第二次的3倍．3次测试的平均成绩为60分．第二次的测试成绩是多少分．
<gadget id="calculator">60 * 3</gadget>
<output>180</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">1 + 2 + 6</gadget>
<output>9</output>

<gadget id="calculator">180 / 9</gadget>
<output>20</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<result>40</result>