product is priced at 15% higher than the cost price, and sold at a 20% discount. The price is 230 yuan. What is the cost price of this product?
一件商品按成本价提高15%后标价，又以8折出售，售价为230元，这种商品的成本价是多少．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">230 / (4/5)</gadget>
<output>575/2 = around 287.5</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">(575/2) / (23/20)</gadget>
<output>250</output>

<result>250</result>