The price of a refrigerator is first increased by 20%, and then discounted by 10%. How much is the increase compared with the original price?
一台冰箱的价格先提高20%，然后再打九折，结果与原价相比提高了多少
<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">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 * (6/5) * (9/10)</gadget>
<output>27/25 = around 1.08</output>

<gadget id="calculator">(27/25) - 1</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>