After building a road, after completing the full length (1/6), there is still 125 kilometers away from the midpoint. How many kilometers is the total length of this road?
修一条公路，完成了全长的(1/6)后，离中点还有125千米，这条公路全长多少千米？
<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">125 / (1/3)</gadget>
<output>375</output>

<result>375</result>