Calculation: ((2/3)-(1/6))*18.
计算：((2/3)-(1/6))*18．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(2/3) - (1/6)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 18</gadget>
<output>9</output>

<result>9</result>