To build a road, Team A alone takes 20 days to complete it, and Team B takes 30 days to complete it. After the two teams repaired together for 10 days, there is still 300 meters left to be repaired. How many kilometers is this road?
修一条路，单独修甲队，用20天完成，乙队用30天完成，两队和修10天后，还余下300米没修，这条路有多少千米？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/20) + (1/30)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 10</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">300 / (1/6) / 1_000</gadget>
<output>9/5 = around 1.8</output>

<result>9/5 = around 1.8</result>