A top is 20.5 yuan, which is 2.7 yuan more expensive than a pair of trousers. How much does it cost to buy a top and a pair of trousers?
一件上衣20.5元钱，比一条裤子贵2.7元，买一件上衣和一条裤子共花多少钱？
<gadget id="calculator">20.5 - 2.7</gadget>
<output>17.8</output>

<gadget id="calculator">17.8 + 20.5</gadget>
<output>38.3</output>

<result>38.3</result>