The school will add two new books to the library, "The Encyclopedia of Stories" and "The Encyclopedia of Knowledge", 3 sets of each. "Story Encyclopedia" is 18 yuan per set, and "Knowledge Encyclopedia" is 125 yuan per set. How much does the school cost in total?
学校要为图书室添置《故事大全》《知识百科》两种新书，每种3套．《故事大全》每套18元，《知识百科》每套125元．学校一共要花多少钱？
<gadget id="calculator">125 + 18</gadget>
<output>143</output>

<gadget id="calculator">143 * 3</gadget>
<output>429</output>

<result>429</result>