80 yuan of clothes, first increase the price by 20%, and then reduce the price by 20%, how much is the current price?
80元的衣服，先涨价20%，再降价20%，现在售价是多少元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

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

<gadget id="calculator">80 * (6/5) * (4/5)</gadget>
<output>384/5 = around 76.8</output>

<result>384/5 = around 76.8</result>