Xiao Ming bought a copy of "Story King". After 25% off, it is 2 yuan cheaper than the original price. How much is the original price of this book?
小明买一本《故事大王》，七五折后，比原价便宜了2元，这本书原价多少元？
<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">2 / (1/4)</gadget>
<output>8</output>

<result>8</result>