A road repairing team built a road, and repaired (7/20) kilometers on the first day, and (9/20) kilometers on the second day, how many kilometers were repaired in two days?
一支修路队修路，第一天修了(7/20)千米，第二天修了(9/20)千米，两天共修了多少千米？
<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(7/20) + (9/20)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>