Xiao Ming boils water and makes tea for the guests. It takes 1 minute to wash the kettle, 9 minutes to boil the water, 1 minute to wash the teacup, 1 minute to take the tea leaves, and 2 minutes to brew the tea.
小明给客人烧水沏茶，洗水壶要1分钟，烧开水要9分钟，洗茶杯要1分钟，拿茶叶要1分钟，沏茶2分钟，客人都喝上茶最少要等多少分钟．
<gadget id="calculator">1 + 9 + 2</gadget>
<output>12</output>

<result>12</result>