The workers repaired a road, and repaired the full length (2/15) on the first day, and repaired 420 meters more than the first day on the second day. It is known that the ratio of unrepaired roads to repaired roads is 2:3, which is How many meters is the total length of the road?
工人们修一条公路，第一天修了全长的(2/15)，第二天比第一天多修420米，已知未修的路与已修的路的比是2：3，这条公路全长是多少米？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(3/5) - (2/15)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(7/15) - (2/15)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">420 / (1/3)</gadget>
<output>1_260</output>

<result>1_260</result>