The school will add two new books, Children's Encyclopedia and Mathematical Guess, to the library, 3 sets of each. Children's encyclopedias are 125 yuan per set, and mathematical guesses are 18 yuan per set. How much will it cost in total?
学校要为图书馆增添儿童百科和数学猜想两种新书，每种3套．儿童百科每套125元，数学猜想每套18元．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>