An engineering team dug a canal, dug (2/7) kilometers on the first day, (1/10) kilometers on the second day, and (1/2) kilometers on the third day, and dug a total of three days How many kilometers did you travel?
一个工程队挖一条水渠，第一天挖了(2/7)千米，第二天挖了(1/10)千米，第三天挖了(1/2)千米，三天共挖了多少千米？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(2/7) + (1/10) + (1/2)</gadget>
<output>31/35 = around 0.885714</output>

<result>31/35 = around 0.885714</result>