Xiao Ming and Xiao Li buy a story book together. Xiao Ming has 5.6 yuan, Xiao Li has 6.3 yuan, and after buying the book, there is still 1.2 yuan left. How much is a story book?
小明和小利合买一本故事书，小明有5.6元，小丽有6.3元，买了书后还剩下1.2元，故事书多少钱一本？
<gadget id="calculator">6.3 - 1.2</gadget>
<output>5.1</output>

<gadget id="calculator">5.6 + 5.1</gadget>
<output>10.7</output>

<result>10.7</result>