(7/8)*(12/13)+(7/8)/13.
(7/8)*(12/13)+(7/8)/13．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">12 / 13</gadget>
<output>12/13 = around 0.923077</output>

<gadget id="calculator">(7/8) * (12/13)</gadget>
<output>21/26 = around 0.807692</output>

<gadget id="calculator">(7/8) / 13</gadget>
<output>7/104 = around 0.067308</output>

<gadget id="calculator">(21/26) + (7/104)</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>