There are apples and pears in the fruit shop, and pears account for the total (13/28). After selling 2 tons of pears and 2 tons of apples, pears account for the two types of fruits (6/13). The fruit shop originally had this kind of fruit How many tons in total.
水果店有苹果和梨两种水果，梨占总数的(13/28)，卖了2吨梨和2吨苹果后，梨占两种水果的(6/13)，水果店原有这种水果共多少吨．
<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">2 - (12/13) - (12/13)</gadget>
<output>2/13 = around 0.153846</output>

<gadget id="calculator">13 / 28</gadget>
<output>13/28 = around 0.464286</output>

<gadget id="calculator">(13/28) - (6/13)</gadget>
<output>1/364 = around 0.002747</output>

<gadget id="calculator">(2/13) / (1/364)</gadget>
<output>56</output>

<result>56</result>