A kind of clothing is priced at 84 yuan after a 20% price reduction. How much is the original price?
一种服装降价20%后售价为84元，原来的售价是多少元？
<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">84 / (4/5)</gadget>
<output>105</output>

<result>105</result>