x-(2/3)x-(1/3)=1.
x-(2/3)x-(1/3)=1．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) + 1</gadget>
<output>4/3 = around 1.333333</output>

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

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(4/3) / (1/3)</gadget>
<output>4</output>

<result>4</result>