There are two saplings, one is (9/10) meters high and the other is (8/10) meters high, how much taller is one than the other?
有两棵树苗，一棵高(9/10)米，另一棵高(8/10)米，一棵比另一棵高多少米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(9/10) - (4/5)</gadget>
<output>1/10 = around 0.1</output>

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