An engineering team repaired a road on the first day (3/20), and then repaired another 14 kilometers on the second day, just to the midpoint. How long is the road to be repaired?
某工程队修一条公路，第一天修了(3/20)，第二天再修14千米，刚好修到中点，这条要修的公路有多长？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(1/2) - (3/20)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">14 / (7/20)</gadget>
<output>40</output>

<result>40</result>