Xiao Ming went to the bookstore and bought a dictionary for 15.6 yuan, and also bought a "Youth Encyclopedia", which was 9.2 yuan more expensive than the dictionary. How much did Xiao Ming spend on buying books?
小明去书店，买了一本字典用15.6元，还买了一本《少年百科全书》，《少年百科全书》比字典贵9.2元，小明买书共花多少钱？
<gadget id="calculator">15.6 + 9.2 + 15.6</gadget>
<output>40.4</output>

<result>40.4</result>