A children's top is 48.5 yuan, a pair of trousers is 9.8 yuan cheaper than the top, and a skirt is 2.5 yuan more expensive than the trousers. How much is this dress?
一件儿童上衣48.5元，一条长裤比上衣便宜9.8元，一条裙子又比长裤贵2.5元．这条裙子多少钱？
<gadget id="calculator">48.5 - 9.8</gadget>
<output>38.7</output>

<gadget id="calculator">38.7 + 2.5</gadget>
<output>41.2</output>

<result>41.2</result>