A math book is 4.25 yuan, which is 1.27 yuan cheaper than a story book. How much does it cost to buy a math book and a story book?
一本数学书4.25元，比一本故事书便宜1.27元，买一本数学书和一本故事书共花几元？
<gadget id="calculator">4.25 + 1.27 + 4.25</gadget>
<output>9.77</output>

<result>9.77</result>