The selling price of a commodity is 2000 yuan, and its loss rate is 20%, what is the cost price of this commodity?
一件商品的售价为2000元，其亏损率为20%，求此商品的成本价为多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2_000 / (4/5)</gadget>
<output>2_500</output>

<result>2_500</result>