In Hongbo shopping mall, a pair of trousers is 18 yuan, and the price of a jacket is twice that of a pair of trousers. How much does it cost to buy a set of clothes?
鸿博商场，一条裤子18元，一件上衣的价钱是一条裤子的2倍，买一套衣服，需要多少钱？
<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<gadget id="calculator">36 + 18</gadget>
<output>54</output>

<result>54</result>