One road has already been repaired (1/6), and the repair of another 600 meters is exactly half completed. How many meters is this road?
一条路已经修了(1/6)，再修复600米正好修完一半．这条路长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/2) - (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">600 / (1/3)</gadget>
<output>1_800</output>

<result>1_800</result>