Two teams jointly repair a road, the first team repaired 40% of the total length, and the second team repaired 450km. At this time, the total kilometers repaired by the two teams is 350km less than the total length (2/3). How many kilometers is this road?
两队合修一条路，第一队修了全长的40%，第二队修了450km，这时两队修的总千米数比全长的(2/3)还少350km．这条路长多少km？
<gadget id="calculator">450 + 350</gadget>
<output>800</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/3) - (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">800 / (4/15)</gadget>
<output>3_000</output>

<result>3_000</result>