Burning candles. There were 12 lighted candles on the table, but 3 were blown out by the wind first, and then 2 were blown out by another gust of wind. How many candles are left on the table?
燃烧的蜡烛．桌子上原来有12根点燃的蜡烛，先被风吹灭了3根，不久又一阵风吹灭了2根，最后桌子上还剩几根蜡烛呢？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<result>5</result>