An engineering team is building a 720-meter-long canal. The construction started on July 28 and was completed on August 5. How many meters of the canal are repaired on average every day?
一个工程队修一条长720米的水渠，从7月28日开工，8月5日完工，平均每天修水渠多少米？
<gadget id="calculator">31 - 28</gadget>
<output>3</output>

<gadget id="calculator">3 + 1 + 5</gadget>
<output>9</output>

<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<result>80</result>