40% of a road is repaired on the first day, and 70 meters are repaired on the second day, and (1/4) is left. How many meters is the total length of this road?
一条公路第一天修40%，第二天修70米，还剩(1/4)，这条路全长多少米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (2/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

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

<result>200</result>