Xiao Ming boils water to make tea for the guests. It takes 1 minute to wash the kettle, 7 minutes to boil the water, 2 minutes to wash the teacup, 1 minute to take the tea leaves, and 1 minute to brew the tea. The minimum time for the guests to drink the tea is how many minutes.
小明给客人烧水沏茶，洗水壶要1分钟，烧开水要7分钟，洗茶杯要2分钟，拿茶叶要1分钟，沏茶1分钟，客人喝上茶最少要等多少分钟．
<gadget id="calculator">1 + 7 + 1</gadget>
<output>9</output>

<result>9</result>