The engineering team repairs a road and works 6 hours a day, which can be completed in 20 days. If the work efficiency remains the same, and it takes 15 days to complete the task, how many hours should you work per day?
工程队修一条马路，每天工作6小时，20天可以完成．如果工作效率不变，要用15天完成任务，每天应工作多少小时？
<gadget id="calculator">1 / 6 / 20</gadget>
<output>1/120 = around 0.008333</output>

<gadget id="calculator">1 / 15 / (1/120)</gadget>
<output>8</output>

<result>8</result>