((7/9)-(1/3))*((7/9)+(2/3)); 66*((8/11)+(5/33)+(7/22)); 3(3/4)*0.75+6.25*75%; 23*(1/5)+76/5+20%.
((7/9)-(1/3))*((7/9)+(2/3))；66*((8/11)+(5/33)+(7/22))；3(3/4)*0.75+6.25*75%；23*(1/5)+76/5+20%．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">23 * (1/5)</gadget>
<output>23/5 = around 4.6</output>

<gadget id="calculator">76 / 5</gadget>
<output>76/5 = around 15.2</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(23/5) + (76/5) + (1/5)</gadget>
<output>20</output>

<result>20</result>