The workers repaired a road. They repaired the full length (1/3) in the first week, and repaired the full length (2/5) in the second week. There are 1600 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(2/5)，还剩1600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">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/3) + (2/5)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">1 - (11/15)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1_600 / (4/15)</gadget>
<output>6_000</output>

<result>6_000</result>