Lizhuang Village built a 1200-meter-long cement channel, and 240 meters have been repaired. The rest will be completed within 15 days. How many meters will be repaired on average every day?
李庄村修建一条1200米长的水泥渠道，已经修好了240米，余下的要在15天内修完，平均每天要修多少米？
<gadget id="calculator">1_200 - 240</gadget>
<output>960</output>

<gadget id="calculator">960 / 15</gadget>
<output>64</output>

<result>64</result>