The workers built a road, and in the first month they built the full length (1/4). If another 6 kilometers were repaired, then the repaired length would be the remaining (2/3). How long is this road in kilometers?
工人们修一条公路，第一个月修了全长的(1/4)，如果再修6千米，那么已修的长度是剩下的(2/3)，这条公路长多少千米？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">6 / (3/20)</gadget>
<output>40</output>

<result>40</result>