Calculation: (7/12)*(6/13)+(6/13)*(7/12).
计算：(7/12)*(6/13)+(6/13)*(7/12)．
<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">(7/12) * (6/13)</gadget>
<output>7/26 = around 0.269231</output>

<gadget id="calculator">(6/13) * (7/12)</gadget>
<output>7/26 = around 0.269231</output>

<gadget id="calculator">(7/26) + (7/26)</gadget>
<output>7/13 = around 0.538462</output>

<result>7/13 = around 0.538462</result>