Add 6 to a certain number, multiply by 6, and divide by 6. The result is still 6. What is this number?
某数加上6，乘以6，再除以6，其结果还是6，这个数是多少？
<gadget id="calculator">6 / 6</gadget>
<output>1</output>

<gadget id="calculator">6 * 1</gadget>
<output>6</output>

<gadget id="calculator">6 - 6</gadget>
<output>0</output>

<gadget id="calculator">0 / 1</gadget>
<output>0</output>

<result>0</result>