The original price of a book is 24 yuan, how much is the price of 35% off?
一本书原价24元，打六五折的价钱是多少元．
<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">24 * (13/20)</gadget>
<output>78/5 = around 15.6</output>

<result>78/5 = around 15.6</result>