An off-road vehicle of the scientific expedition team needs to cross a desert with a total distance of more than 600 kilometers, but this vehicle can only drive 600 kilometers at most each time it is filled with gasoline. The team leader came up with a way to set up a fuel storage point in the desert A, the off-road vehicle is full of fuel and starts from the starting point S. When it reaches the oil storage point A, take out some oil from the car and put it into the A oil storage point, then return to the starting point, fill up the oil and then drive to A. When it arrives at the A oil storage point Take out the stored oil and put it on the car, from the starting point A to the end point E. Using the method the team leader came up with, the off-road vehicle completed the task without the help of other vehicles. Then, how many kilometers is the maximum travel distance of this off-road vehicle across the desert?
科学考察队的一辆越野车需要穿越一片全程大于600千米的沙漠，但这辆车每次装满汽油最多只能驶600千米，队长想出一个方法，在沙漠中设一个储油点A，越野车装满油从起点S出发，到储油点A时从车中取出部分油放进A储油点，然后返回出发点，加满油后再开往A，到A储油点时取出储存的油放在车上，从A出发点到达终点E．用队长想出的方法，越野车不用其他车帮助就完成了任务，那么，这辆越野车穿越这片沙漠的最大行程是多少千米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 600</gadget>
<output>200</output>

<gadget id="calculator">200 + 600</gadget>
<output>800</output>

<result>800</result>