After selling an air conditioner with a 20% discount, you have to pay 3,200 yuan in cash. How much is the air conditioner originally sold for?
一台空调打八折销售后要付现金3200元，原来这台空调卖多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3_200 / (4/5)</gadget>
<output>4_000</output>

<result>4_000</result>