A number multiplied by 6, subtracted from 6, and then divided by 6, the result is still 6. Find this number.
一个数乘6，再减去6，然后再除以6，结果仍是6．求这个数．
<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>

<result>7</result>