Xiao Ming helps his mother boil water and make tea for the guests. How long does it take at least for the guests to drink tea? (Boiling water for 9 minutes, washing tea cups for 3 minutes, receiving water for 2 minutes, looking for tea leaves for 2 minutes, brewing tea for 1 minute)
小明帮妈妈烧开水沏茶给客人喝，最少用多少分钟能让客人喝上茶．(烧水9分钟，洗茶杯3分钟，接水2分钟，找茶叶2分钟，沏茶1分钟)
<gadget id="calculator">2 + 9 + 1</gadget>
<output>12</output>

<result>12</result>