((5/6)-(5/9))*(18/5).
((5/6)-(5/9))*(18/5)．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(5/6) - (5/9)</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">18 / 5</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">(5/18) * (18/5)</gadget>
<output>1</output>

<result>1</result>