A fishing boat catches (2/3) tons in the first ten days of a certain month, catches (5/6) more tons in the middle ten days of the month, and catches (3/5) more tons in the second ten days of the month than in the middle ten days of the month. How many tons are fished in the last ten days of the month?
一艘捕鱼船，某月上旬捕鱼(2/3)吨，中旬捕鱼量是上旬的(5/6)，下旬比中旬多捕了(3/5)吨，下旬捕鱼多少吨？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(2/3) * (5/6)</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(5/9) + (3/5)</gadget>
<output>52/45 = around 1.155556</output>

<result>52/45 = around 1.155556</result>