To build a canal, if you build 8 meters more per day, you can finish it 4 days ahead of time, if you build 8 meters less per day, you have to delay the completion of 8 days, what is the length of this canal?
修一条水渠，如果每天多修8米，可提前4天完成，如果每天少修8米，要推迟8天完成，求这条水渠的长度？
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">64 + 32</gadget>
<output>96</output>

<gadget id="calculator">8 - 4</gadget>
<output>4</output>

<gadget id="calculator">96 / 4</gadget>
<output>24</output>

<gadget id="calculator">8 + 4 + 4</gadget>
<output>16</output>

<gadget id="calculator">24 * 16</gadget>
<output>384</output>

<result>384</result>