(5/9)+(10/7)+(4/9)+(4/7).
(5/9)+(10/7)+(4/9)+(4/7)．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">10 / 7</gadget>
<output>10/7 = around 1.428571</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(5/9) + (10/7) + (4/9) + (4/7)</gadget>
<output>3</output>

<result>3</result>