(9/10)*9+(9/10).
(9/10)*9+(9/10)．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) * 9</gadget>
<output>81/10 = around 8.1</output>

<gadget id="calculator">(81/10) + (9/10)</gadget>
<output>9</output>

<result>9</result>