Liri Shopping Center sells some products at a 20% discount during the "October" National Day. A coat is 128 yuan cheaper. How much is the original price?
丽日商场"十一"国庆期间部分商品8折出售，一件上衣便宜了128元，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">128 / (1/5)</gadget>
<output>640</output>

<result>640</result>