To build a road with a total length of 108 kilometers, 36 kilometers will be repaired in 6 days, according to this calculation. How many days will it take to finish this road? (Solve with ratio)
修一条公路，总长108千米，开工6天修36千米，照这计算．修完这条路还要多少天？(用比例解)
<gadget id="calculator">108 - 36</gadget>
<output>72</output>

<gadget id="calculator">36 / 6</gadget>
<output>6</output>

<gadget id="calculator">72 / 6</gadget>
<output>12</output>

<result>12</result>