There are apples and pears in the fruit shop. Pears account for (5/11) of the total of the two fruits. After selling 1 ton of pears and 2 tons of apples, pears account for (6/13) of the total of the two fruits. Ask the fruit shop How many tons are there in total for these two kinds of fruits?
果品商店有苹果和梨两种水果，梨占两种水果总数的(5/11)，卖出1吨梨和2吨苹果后，梨占两种水果总数的(6/13)，问水果店原有这两种水果共多少吨？
<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">2 * (6/13)</gadget>
<output>12/13 = around 0.923077</output>

<gadget id="calculator">(12/13) - 1</gadget>
<output>-1/13 = around -0.076923</output>

<gadget id="calculator">(6/13) + (-1/13)</gadget>
<output>5/13 = around 0.384615</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">(6/13) - (5/11)</gadget>
<output>1/143 = around 0.006993</output>

<gadget id="calculator">(5/13) / (1/143)</gadget>
<output>55</output>

<result>55</result>