There are two small trees, the first tree is (9/10) meters high, and the second tree is (8/10) meters high. Which tree is taller? How many meters high?
两棵小树，第一棵树高(9/10)米，第二棵树高(8/10)米．哪一棵树高？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>