If the price of a commodity is reduced by 20%, the price is 1600 yuan. What is the original price of this commodity?
一件商品降价20%后价格是1600元，这件商品原价是多少元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">1_600 / (4/5)</gadget>
<output>2_000</output>

<result>2_000</result>