football is sold at a 20% discount, which is 16.8 yuan cheaper than the original one. How much is the original price of this football?
一种足球打八折出售，比原来便宜16.8元，这种足球的原价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">16.8 / (1/5)</gadget>
<output>84</output>

<result>84</result>