The bookstore shipped 860 story books, and the number of science books is 7 times that of story books. How many more science books than story books?
书店运来故事书860本，科技书的本数是故事书的7倍，科技书比故事书多多少本？
<gadget id="calculator">860 * 7</gadget>
<output>6_020</output>

<gadget id="calculator">6_020 - 860</gadget>
<output>5_160</output>

<result>5_160</result>