A copy of "Fairy Tale" is 12.8 yuan, and a copy of "Animal World" is 25.6 yuan. How much does it cost to buy these two books?
一本《童话故事》12.8元，一本《动物世界》25.6元，买这两本书一共需要多少钱？
<gadget id="calculator">12.8 + 25.6</gadget>
<output>38.4</output>

<result>38.4</result>