The purchase price of a commodity is 1,500 yuan. When the commodity is sold at a discount of 10% off the price, the profit rate (the ratio of the profit of the commodity to the purchase price) is 20%. Find the price of the commodity.
某商品的进价是1500元，按商品的标价9折出售时，利润率(商品利润与进价的比值)是20%，求商品的标价是多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1_500 * (1/5)</gadget>
<output>300</output>

<gadget id="calculator">1_500 + 300</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 / 0.9</gadget>
<output>2_000</output>

<result>2_000</result>