The school will add two new books to the library, one is "Children's Encyclopedia", each set is 125 yuan, and the other is "Mathematical Conjecture", each set is 18 yuan, 3 sets of each, how much is the total?
学校要为图书馆增添两种新书，一种是《儿童百科》，每套125元，另一种是《数学猜想》，每套18元，每种3套，一共多少元？
<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>