The original price of a product is 200 yuan, now the price is reduced by 20%, and then the price is increased by 20%, what is the final price
某商品原价200元，现在先降价20%，然后又提价20%，最后售价是多少元
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">200 * (4/5) * (6/5)</gadget>
<output>192</output>

<result>192</result>