The original price of a coat is 100 yuan, the price will be reduced by 20% first, and then the price will be increased by 20%. What is the current price.
一件上衣原价100元，先降价20%，再涨价20%．现价是多少．
<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">100 * (4/5) * (6/5)</gadget>
<output>96</output>

<result>96</result>