Uncle Wang bought a document package in the store, and the store sold it at a 25% discount, which was 80 yuan cheaper than the original price. How much is the original price of this package?
王叔叔在商店购买了一个文件包，商店打七五折卖出，比原价优惠了80元．这个文件包的原价是多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">80 / (1/4)</gadget>
<output>320</output>

<result>320</result>