(9/5): (5/6).
(9/5)：(5/6)．
<gadget id="calculator">9 / 5</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(9/5) * 30</gadget>
<output>54</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) * 30</gadget>
<output>25</output>

<gadget id="calculator">54 / 25</gadget>
<output>54/25 = around 2.16</output>

<result>54/25 = around 2.16</result>