A road construction team repaired (7/10) kilometers on the first day, (1/10) kilometers more than the second day, and (2/5) kilometers were not repaired. The road has a total of kilometers.
某修路队，第一天修了(7/10)千米，比第二天多修了(1/10)千米，还有(2/5)千米没修，这条路共有千米．
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

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

<gadget id="calculator">(7/10) - (1/10)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(7/10) + (3/5) + (2/5)</gadget>
<output>17/10 = around 1.7</output>

<result>17/10 = around 1.7</result>