The side length of a square is (9/10) meters, what is its area in square meters?
一个正方形边长是(9/10)米，它的面积是多少平方米．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) * (9/10)</gadget>
<output>81/100 = around 0.81</output>

<result>81/100 = around 0.81</result>