The road repair team rushed to repair a section of road. The ratio of the road repaired to the entire road on the first day was 1:3, and 50 meters were repaired on the second day. At this time, the ratio of the road that has been built to the road that has not been repaired is 5:4. How many meters is the length of this road?
修路队抢修一段路，第一天修好的路与全段路的比是1：3，第二天修好50米．这时，已修的路跟未修的比是5：4，求这段路长多少米？
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

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

<gadget id="calculator">(5/9) - (1/3)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">50 / (2/9)</gadget>
<output>225</output>

<result>225</result>