The perimeter of a square is (9/10) meters, what is its side length in meters?
一个正方形的周长是(9/10)米，它的边长是多少米．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) / 4</gadget>
<output>9/40 = around 0.225</output>

<result>9/40 = around 0.225</result>