Calculation: (7/13)/7+(1/7)*(6/13).
计算：(7/13)/7+(1/7)*(6/13)．
<gadget id="calculator">7 / 13</gadget>
<output>7/13 = around 0.538462</output>

<gadget id="calculator">(7/13) / 7</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

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

<gadget id="calculator">(1/7) * (6/13)</gadget>
<output>6/91 = around 0.065934</output>

<gadget id="calculator">(1/13) + (6/91)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>