If the length of a rectangle is increased by (1/2) and the width is decreased by (2/3), the area of the resulting rectangle is ((())/(())) less than the original rectangle.
一个长方形的长增加(1/2)，宽减少(2/3)，所得长方形的面积比原来长方形减少((())/(()))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>