The road construction team has built a road, and it has already been repaired (1/4). After another 300 meters, the ratio of the length of the repaired to the unrepaired length is 1:2. How many meters is the total length of this road?
修路队修一条路，已经修了(1/4)，再修300米后已修和未修长度比是1：2，这段路全长多少米？
<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 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) - (1/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">300 / (1/12)</gadget>
<output>3_600</output>

<result>3_600</result>