A road of 120 meters is built, and 45 meters are built in 3 days. According to this calculation, how many days will it take to complete the repair? (Solve with ratio)
修一条120米的路，3天修了45米，照这样计算，还需要几天修完？(用比例解)
<gadget id="calculator">120 - 45</gadget>
<output>75</output>

<gadget id="calculator">3 * 75</gadget>
<output>225</output>

<gadget id="calculator">225 / 45</gadget>
<output>5</output>

<result>5</result>