(2/3)+((2/3)-(3/5))*(5/3).
(2/3)+((2/3)-(3/5))*(5/3)．
<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>1/15 = around 0.066667</output>

<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(1/15) * (5/3)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(2/3) + (1/9)</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>