The price of a pair of trousers is 15 yuan, and the price of a jacket is three times that of a pair of trousers. How much does it cost to buy such a suit?
一条裤子的价钱是15元，一件上衣的价钱是一条裤子的3倍．买这样一套衣服，需要多少钱？
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<gadget id="calculator">45 + 15</gadget>
<output>60</output>

<result>60</result>