East Village needs to build a 2,400-meter-long canal, and 560 meters were built in the first 7 days. According to this calculation, how many days will it take to complete the repair.
东村要修一条长2400米的水渠，前7天修了560米，照这样计算，一共需要多少天才能修完．
<gadget id="calculator">2_400 - 560</gadget>
<output>1_840</output>

<gadget id="calculator">560 / 7</gadget>
<output>80</output>

<gadget id="calculator">1_840 / 80</gadget>
<output>23</output>

<gadget id="calculator">23 + 7</gadget>
<output>30</output>

<result>30</result>