If two adjacent sides of a rectangle increase their (1/3), then the area of the resulting rectangle is increased by the original area
如果一个长方形两条相邻的边都增加它们的(1/3)，那么所得的长方形的面积比原来增加了原来面积的多少
<gadget id="calculator">16 / 9</gadget>
<output>16/9 = around 1.777778</output>

<gadget id="calculator">(16/9) - 1</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>