What is the quotient of (9/10) of (2/9) divided by the difference between 20 and 18?
(2/9)的(9/10)除以20与18的差，商是多少？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(2/9) * (9/10)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 - 18</gadget>
<output>2</output>

<gadget id="calculator">(1/5) / 2</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>