An engineering team repairs a canal and works 6 hours a day, which can be completed in 12 days. If the work efficiency remains the same, how many days can the task be completed by working 2 hours more per day? (Solve with ratio)
某工程队修一条水渠，每天工作6小时，12天可以完成．如果工作效率不变，每天多工作2小时，多少天可以完成任务？(用比例解)
<gadget id="calculator">6 * 12</gadget>
<output>72</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

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

<result>9</result>