The original price of a piece of chocolate is 8 yuan. It is sold at a 20% discount first, and then the price is reduced by 10%. How much is the current price of this piece of chocolate lower than the original price?
一种巧克力原价为8元，先打八折出售，后来再降价10%，这块巧克力的现价比原价降低了多少
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(4/5) * (9/10)</gadget>
<output>18/25 = around 0.72</output>

<gadget id="calculator">1 - (18/25)</gadget>
<output>7/25 = around 0.28</output>

<result>7/25 = around 0.28</result>