There are guests at Xiaogang's house. He entertains the guests to do the following things. The time required is: boil water for 10 minutes, wash fruit for 3 minutes, and make tea for 2 minutes. How many minutes does he need at least to complete these things?
小刚家来了客人，他招待客人做下面的事情，分别所需的时间是：烧开水10分钟，洗水果3分钟，沏茶2分钟，他至少需要多少分钟完成这些事．
<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<result>12</result>