Add 6 to a number, multiply by 6, subtract 6, and finally divide by 6. The result is still equal to 6. What is this number?
一个数加6，再乘6，又减6，最后除以6，结果还等于6，这个数是多少？
<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<gadget id="calculator">36 + 6</gadget>
<output>42</output>

<gadget id="calculator">42 / 6</gadget>
<output>7</output>

<gadget id="calculator">7 - 6</gadget>
<output>1</output>

<result>1</result>