Calculation: (18/17)*(4/5)-(4/17)*(3/5).
计算：(18/17)*(4/5)-(4/17)*(3/5)．
<gadget id="calculator">18 / 17</gadget>
<output>18/17 = around 1.058824</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(18/17) * (4/5)</gadget>
<output>72/85 = around 0.847059</output>

<gadget id="calculator">4 / 17</gadget>
<output>4/17 = around 0.235294</output>

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

<gadget id="calculator">(4/17) * (3/5)</gadget>
<output>12/85 = around 0.141176</output>

<gadget id="calculator">(72/85) - (12/85)</gadget>
<output>12/17 = around 0.705882</output>

<result>12/17 = around 0.705882</result>