The mother asked Xiaoxiao to boil water to make tea for the guests. It took 2 minutes to wash the hot water pot, 15 minutes to boil the water, 2 minutes to wash the teapot, 2 minutes to wash the teacup, and 1 minute to get the tea leaves. In order for the guests to drink tea earlier, how many minutes should it take at least.
妈妈让笑笑烧开水给客人沏茶，洗热水壶要2分钟，烧开水要15分钟，洗茶壶要2分钟，洗茶杯要2分钟，拿茶叶要1分钟．为了让客人早点喝上茶，最少要多少分钟．
<gadget id="calculator">2 + 15</gadget>
<output>17</output>

<result>17</result>