Subtract 8 from a number, add 8, divide by 8, multiply by 8, and finally get 8. What is the number?
一个数减去8，加上8，除以8，再乘8，最后仍得8，这个数是多少．
<gadget id="calculator">8 / 8</gadget>
<output>1</output>

<gadget id="calculator">1 * 8</gadget>
<output>8</output>

<gadget id="calculator">8 - 8</gadget>
<output>0</output>

<gadget id="calculator">0 + 8</gadget>
<output>8</output>

<result>8</result>