The side length of the square is (2/9) meters, how many meters is the circumference?
正方形边长(2/9)米，周长多少米？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) * 4</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>