It takes 15 minutes to boil a pot of boiling water, 2 minutes to wash the teacup, 1 minute to prepare the tea leaves, and 2 minutes to brew the tea. How many minutes will it take to finish these things?
烧1壶开水要用15分钟，洗净茶杯要2分钟，准备茶叶要1分钟，泡好茶水要2分钟，做完这些事情最少要用几分钟？
<gadget id="calculator">15 + 2</gadget>
<output>17</output>

<result>17</result>