A product is priced at a profit of 20%, and then sold at a 8.8% discount. The actual profit is 84 yuan. What is the cost of this product?
一件商品按20%的利润定价，然后按8.8折卖出，实际获得利润84元，这件商品的成本是多少元．
<gadget id="calculator">88 / 100</gadget>
<output>22/25 = around 0.88</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (22/25)</gadget>
<output>22/125 = around 0.176</output>

<gadget id="calculator">(22/125) - 1</gadget>
<output>-103/125 = around -0.824</output>

<gadget id="calculator">(22/25) + (-103/125)</gadget>
<output>7/125 = around 0.056</output>

<gadget id="calculator">84 / (7/125)</gadget>
<output>1_500</output>

<result>1_500</result>