There are 253 story books in the school library, and 47 more science books than story books. How many books are there in total?
学校图书馆有故事书253本，科技书比故事书多47本，一共有多少本图书？
<gadget id="calculator">253 + 47</gadget>
<output>300</output>

<gadget id="calculator">253 + 300</gadget>
<output>553</output>

<result>553</result>