The road construction team repaired a road, 20% of the total length was repaired on the first day, and 1/2 of the total length was repaired on the second day, and a total of 140 kilometers was repaired in two days. How long is this road in kilometers?
修路队修一条路，第一天修了全长的20%，第二天修了全长的(1/2)，两天共修了140千米．这条路全长多少千米？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/5) + (1/2)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">140 / (7/10)</gadget>
<output>200</output>

<result>200</result>