2-(6/13)/(9/26)-(2/3).
2-(6/13)/(9/26)-(2/3)．
<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">9 / 26</gadget>
<output>9/26 = around 0.346154</output>

<gadget id="calculator">(6/13) / (9/26)</gadget>
<output>4/3 = around 1.333333</output>

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

<gadget id="calculator">2 - (4/3) - (2/3)</gadget>
<output>0</output>

<result>0</result>