Two cars of the same model start from the same place at the same time and advance along the center of the desert. Each car can carry up to 20 barrels of gasoline (together with the oil in the fuel tank). Each barrel of gasoline can make a car advance 50 kilometers. Both cars must Back to the starting point, you can also borrow the other party's oil. In order to make a car as far away from the starting point as possible. Then, how many kilometers away can this car reach from the starting point?
两辆同一型号的汽车从同一地点同时出发，沿沙漠中心前进，每车最多能带20桶汽油(连同油箱内的油)，每桶汽油可以使一辆汽车前进50千米，两车都必须返回出发地点，也都可以借对方的油．为了使一辆车尽可能地远离出发点．那么，这辆车最远可以到达离出发点多少千米的地方．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">50 * 10 * (4/3)</gadget>
<output>2_000/3 = around 666.666667</output>

<result>2_000/3 = around 666.666667</result>