A jacket is sold for 64 yuan after a 20% discount. What is the formula for finding the original price?
一件夹克衫打8折后卖64元，求原价是多少钱的算式是多少
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">64 / (4/5)</gadget>
<output>80</output>

<result>80</result>