The road construction team plans to finish building a road in April, and those who built this section of road in the first ten days (1/5) will build 70 meters more in the middle ten days than in the first ten days. How many meters is this road?
筑路队计划四月份修完一条路，上旬修了这段路的(1/5)，中旬比上旬多修70米，这时，路已修的与未修的比是3：1．这段路长多少米？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

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

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

<gadget id="calculator">(3/4) - (1/5) - (1/5)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">70 / (7/20)</gadget>
<output>200</output>

<result>200</result>