(1/3)+2.6+(2/3)+0.4.
(1/3)+2.6+(2/3)+0.4．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/3) + 2.6 + (2/3) + 0.4</gadget>
<output>4</output>

<result>4</result>