(11/15)+(3/15)=how much.
(11/15)+(3/15)=多少．
<gadget id="calculator">11 / 15</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(11/15) + (1/5)</gadget>
<output>14/15 = around 0.933333</output>

<result>14/15 = around 0.933333</result>