In the first month of repairing the Luoma Highway, the full length (1/3) was repaired. If another 10 kilometers are repaired, the ratio of the length of the repaired to the unrepaired length is 1:1. How long is this road in kilometers?
修娄马公路，第一个月修了全长的(1/3)，如果再修10千米，已修的和未修的长度比是1：1．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 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">10 / (1/6)</gadget>
<output>60</output>

<result>60</result>