After the price of a piece of clothing is reduced by (1/3), the price is increased by (1/3). The final price of this dress is the original price.
一件衣服降价(1/3)后，又提价(1/3)．这件衣服最后的价格是原来价格的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">1 * (2/3) * (4/3)</gadget>
<output>8/9 = around 0.888889</output>

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