It takes 15 days for a highway to be jointly repaired by A and B, and 20 days if it is jointly repaired by B and C. In fact, A and C have worked together to repair it for 5 days, and A has repaired 0.8 kilometers more than C. How many kilometers is this road in total?
一条公路，如果由甲乙合修需要15天，如果由乙丙合修需要20天，实际上，甲丙合作修了5天，甲就比丙多修了0.8千米．这条公路共有多少千米？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/15) - (1/20)</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">0.8 / 5 / (1/60)</gadget>
<output>9.6</output>

<result>9.6</result>