There are two kinds of new books, one is 125 yuan per set, and the other is 18 yuan per set. You need to buy 3 sets of each. How much will it cost in total?
有两种新书，一种每套125元，一种每套18元，每种要买3套，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>