To build a road, (1/4) of the road was built on the first day, and 20% of the road was built on the second day, which is 50 meters less than the first day. How many meters is the total length of this road?
修一条公路，第一天修了这条路的(1/4)，第二天修了这条路的20%，比第一天少修了50米，这条路一共长多少米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">50 / (1/20)</gadget>
<output>1_000</output>

<result>1_000</result>