The school will add two new books to the library, "Children's Encyclopedia" for 125 yuan per set, and "Mathematical Guess" for 18 yuan per set. If you buy 3 sets of each, how much will it cost in total?
学校要为图书馆增添两种新书，《儿童百科》每套125元，《数学猜想》每套18元．如果每种买3套，一共要花多少钱？
<gadget id="calculator">125 * 3</gadget>
<output>375</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">375 + 54</gadget>
<output>429</output>

<result>429</result>