The road construction team built a road of 880 meters, and a total of 320 meters were built in the first 4 days. According to this calculation, how many days will it take to complete the road.
修路队修一条880米的公路，前4天一共修了320米．照这样计算，修完这条路还要多少天．
<gadget id="calculator">880 - 320</gadget>
<output>560</output>

<gadget id="calculator">320 / 4</gadget>
<output>80</output>

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

<result>7</result>