To build a road, (4/7) kilometers were built on the first day, and (1/7) kilometers were built on the second day, how many kilometers were built in total in two days?
修一条路，第一天修了(4/7)千米，第二天修了(1/7)千米，两天共修了多少千米？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(4/7) + (1/7)</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>