The road repair team repaired a road, and repaired (3/5) kilometers in the first week, (5/6) kilometers in the second week, and (3/10) kilometers less than the sum of the previous two weeks in the third week. ___? (According to the above information, raise a related mathematical problem and answer it.)
修路队修一条公路，第一周修了(3/5)千米，第二周修了(5/6)千米，第三周比前两周修的总和少(3/10)千米．___？(根据以上信息，提出一个相关的数学问题，并解答．)
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(5/6) - (3/10)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">(3/5) + (8/15)</gadget>
<output>17/15 = around 1.133333</output>

<result>17/15 = around 1.133333</result>