There is an elderly chorus consisting of eight people. The captain said: "The average age of the seven of you is 61 years old, and I am 7 years older than the average age of our team." So how old is the captain?
有一个老年合唱队由八个人组成．队长说："你们七人的平均年龄是61岁，我比我们队的平均年龄大7岁．"那么队长的年龄是多少岁．
<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<gadget id="calculator">61 * 7</gadget>
<output>427</output>

<gadget id="calculator">56 + 427</gadget>
<output>483</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">483 / 7</gadget>
<output>69</output>

<result>69</result>