Hedong Village needs to build an 840-meter-long canal. In the first two days, a total of 126 meters will be built. If the rest needs to be completed within 7 days, how many meters will be repaired on average every day?
河东村要修一条840米长的水渠，前2天共修126米，如果剩下的要在7天内修完，那么平均每天要修多少米？
<gadget id="calculator">840 - 126</gadget>
<output>714</output>

<gadget id="calculator">714 / 7</gadget>
<output>102</output>

<result>102</result>