(19/17)-(1/3)/(3/5)-(4/9).
(19/17)-(1/3)/(3/5)-(4/9)．
<gadget id="calculator">19 / 17</gadget>
<output>19/17 = around 1.117647</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/3) / (3/5)</gadget>
<output>5/9 = around 0.555556</output>

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

<gadget id="calculator">(19/17) - (5/9) - (4/9)</gadget>
<output>2/17 = around 0.117647</output>

<result>2/17 = around 0.117647</result>