A pair of trousers is 27 yuan, and a jacket is twice as much as a pair of trousers. How much does it cost to buy such a set of clothes?
一条裤子27元，一件上衣是一条裤子的2倍，买这样一套衣服需要多少元？
<gadget id="calculator">27 * 2</gadget>
<output>54</output>

<gadget id="calculator">54 + 27</gadget>
<output>81</output>

<result>81</result>