If a product is priced at a 20% profit, and then sold at a 10% discount, the total profit is 88 yuan, so how much is the cost of this product?
某件商品按20%的利润定价，后按降价10%卖出，共得利润88元，那么这件商品成本是多少元．
<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">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">(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>

<gadget id="calculator">88 / (2/25)</gadget>
<output>1_100</output>

<result>1_100</result>