Add 8 to a number, multiply by 8, subtract 8, divide by 8, the result is still 8. Do you know what this number is?
一个数加上8，乘8，减去8，除以8，结果还是8．你知道这个数是多少吗？
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">64 + 8</gadget>
<output>72</output>

<gadget id="calculator">72 / 8</gadget>
<output>9</output>

<gadget id="calculator">9 - 8</gadget>
<output>1</output>

<result>1</result>