If the price of a commodity is increased by 10% and then decreased by 20%, what is the current price of the original price?
一种商品，先涨价10%，然后又降价20%，现价是原价的多少
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<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">100 * (11/10) * (4/5)</gadget>
<output>88</output>

<gadget id="calculator">88 / 100</gadget>
<output>22/25 = around 0.88</output>

<result>22/25 = around 0.88</result>