Shengli Village plans to build a water canal. In the first month, (1/6) kilometers were built, and (1/10) kilometers were built more than in the second month. It was completed in two months. How many kilometers is the total length of this water canal? ?
胜利村计划修一条水渠，第一个月修了(1/6)千米，比第二个月多修(1/10)千米，两个月正好修完，这条水渠全长多少千米？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">(1/6) - (1/10)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/6) + (1/15)</gadget>
<output>7/30 = around 0.233333</output>

<result>7/30 = around 0.233333</result>