The original price of a commodity is 200 yuan. If the price is increased by 20% and then reduced by 20%, how much is the current price of the commodity less than the original price?
一件商品原价200元，如果先提价20%，再降价20%，那么此商品现在的价格与原来相比少多少元
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

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

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

<gadget id="calculator">200 - 192</gadget>
<output>8</output>

<result>8</result>