Add 5 to a number, multiply by 5, subtract 5, divide by 5, and the result is 5. Find this number.
某数加上5，乘以5，减去5，除以5，其结果等于5．求这个数．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">25 + 5</gadget>
<output>30</output>

<gadget id="calculator">30 / 5</gadget>
<output>6</output>

<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<result>1</result>