Xinhua Bookstore has newly purchased 3,800 story books, 800 more than technology books. How many books are there in total?
新华书店新进故事书3800本，比科技书多进800本，两种书共进多少本？
<gadget id="calculator">3_800 - 800</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 + 3_800</gadget>
<output>6_800</output>

<result>6_800</result>