The workers repaired a road. They repaired 1/3 of the total length in the first week, and 40% of the total length in the second week. There are 2,400 meters left to be repaired. How many meters is the total length of this road?
工人们修一条路，第一周修了全长的(1/3)，第二周修了全长的40%，还剩2400米没修，这条路全长多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/3) - (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">2_400 / (4/15)</gadget>
<output>9_000</output>

<result>9_000</result>