It costs 50 yuan to buy a jacket and 40 yuan to buy a pair of trousers. How much does it cost to buy two sets of clothes?
买一件上衣需50元，一条裤子40元，买两套衣服要多少钱？
<gadget id="calculator">50 + 40</gadget>
<output>90</output>

<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<result>180</result>