When a road construction team builds a road, the ratio of the length of the repaired to the length of the unrepaired is 1:5. After repairing another 350 meters, the ratio of the repaired length to the unrepaired length is exactly 3. How long is this road in meters? (Friendly Reminder: Transformation Strategies)
修路队修一条路，已修好的与未修好的长度的比是1：5．再修350米后，已修好的与未修的长度的比值正好是3．这条路全长多少米？(友情提醒：转化的策略)
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(3/4) - (1/6)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">350 / (7/12)</gadget>
<output>600</output>

<result>600</result>