The road construction team builds a road, and completes 30% of the total length in the first month, completes the full length (3/5) in the second month, and repairs 900 meters more in the second month than in the first month. This road is long How many kilometers?
修路队修一条路，第一个月完成全长的30%，第二个月完成全长的(3/5)，第二个月比第一个月多修900米，这条路长多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">900 / (3/10) / 1_000</gadget>
<output>3</output>

<result>3</result>