A 1200-meter road was built, and 480 meters were built in the first 4 days. According to this calculation, how many days will it take to complete the road? (Solve with ratio)
修一条1200米的路，前4天修了480米．照这样计算，修完这条路要用多少天？(用比例解)
<gadget id="calculator">1_200 * 4</gadget>
<output>4_800</output>

<gadget id="calculator">4_800 / 480</gadget>
<output>10</output>

<result>10</result>