A road has been repaired (1/5). If it is repaired for another 300 meters, the ratio of the repaired length to the remaining length is 1:2. What is the total length of the road in meters?
一条公路已修了它的(1/5)，如果再修300米，这样修好和剩下的长度的比是1：2，这条公路全长多少米．
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/3) - (1/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">300 / (2/15)</gadget>
<output>2_250</output>

<result>2_250</result>