Calculation: (2/3)+(3/5)=how much.
计算：(2/3)+(3/5)=多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/3) + (3/5)</gadget>
<output>19/15 = around 1.266667</output>

<result>19/15 = around 1.266667</result>