The price of a pair of trousers is 18 yuan, and the price of a jacket is three times that of a pair of trousers. How much does it cost to buy a set of such clothes?
一条裤子的价格是18元，一件上衣的价格是一条裤子的3倍，买一套这样的衣服共用多少元钱？
<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">54 + 18</gadget>
<output>72</output>

<result>72</result>