In the "May 1st" promotion, all household appliances in a shopping mall are discounted by 20%. Zhang Xiaojun spent 800 yuan enough to buy a TV. How much is the original price of this TV?
"五一"促销活动中，某商场所有的家用电器都优惠20%．张晓军用了800元够买一台电视机，这台电视机的原价是多少元？
<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">800 / (4/5)</gadget>
<output>1_000</output>

<result>1_000</result>