There were 10 lighted candles in the room, the wind blew out the window, blew out 2 candles, and then blew out 1 candle, and then the owner closed the window. Open the room the next day, how many candles are there in the room?
房间里有10支点燃的蜡烛，风从窗外吹来，吹灭了2支，接着又吹灭了1支，后来主人关好了窗户．第二天打开房间，房内还有几支蜡烛？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<result>3</result>