Calculation: (9/7)+(1/8)+(5/7)+(3/8); (13/14)-((9/14)+(1/7)).
计算：(9/7)+(1/8)+(5/7)+(3/8)；(13/14)-((9/14)+(1/7))．
<gadget id="calculator">13 / 14</gadget>
<output>13/14 = around 0.928571</output>

<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

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

<gadget id="calculator">(9/14) + (1/7)</gadget>
<output>11/14 = around 0.785714</output>

<gadget id="calculator">(13/14) - (11/14)</gadget>
<output>1/7 = around 0.142857</output>

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