Xiaoli washes her hands for 2 minutes after school, 8 minutes for eating, 3 minutes for washing dishes after meals, 20 minutes for homework, 15 minutes for heating water, 7 minutes for shampooing, and 30 minutes for drying her hair. How many minutes does it take her to do these things at least?
小丽放学回家洗手用2分钟，吃饭用8分钟，饭后洗碗用3分钟，写作业用20分钟，给水加热15分钟，洗头7分钟，晾干头发30分钟．她干这些事最少要多少分钟？
<gadget id="calculator">15 + 7 + 30</gadget>
<output>52</output>

<result>52</result>