Xiaogang’s family has guests, and the time he spends on entertaining them is: boiling water for 10 minutes, washing fruit for 3 minutes, brewing tea for 2 minutes, and sweeping the floor for 5 minutes. How many minutes should he spend at least?
小刚家来客人，他招待客人做事所用的时间是：烧开水10分钟，洗水果3分钟，沏茶2分钟，扫地5分钟他至少要用多少分钟．
<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<result>12</result>