In a math test, the average score of 9 students is 72. After removing the score of one transfer student, the average score of the remaining students is 78. What is the score of the transfer student?
某次数学考试中，9个同学的平均分是72，去掉一个转学同学的成绩后，剩下的同学的平均分是为78分，转学走的同学的成绩为多少分．
<gadget id="calculator">72 * 9</gadget>
<output>648</output>

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

<gadget id="calculator">78 * 8</gadget>
<output>624</output>

<gadget id="calculator">648 - 624</gadget>
<output>24</output>

<result>24</result>