A product is sold at a 20% discount. The current price is 84 yuan. How much is the original price?
一件商品打8折出售，现在的价格为84元，原价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">84 / (4/5)</gadget>
<output>105</output>

<result>105</result>