A section of road was repaired, the full length (1/5) was repaired in the first week, and 600 meters was repaired in the second week, which was exactly half of the repair. How many kilometers is this road?
修一段路，第一周修了全长的(1/5)，第二周又修了600米，这时正好修了一半．这段路有多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/2) - (1/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">600 / (3/10) / 1_000</gadget>
<output>2</output>

<result>2</result>