Xiaohua wants to help her mother do the following things on weekends: It takes 20 minutes to wash clothes with the washing machine, 12 minutes to sweep the floor, 10 minutes to wipe the furniture, and 5 minutes to dry the clothes. After reasonable arrangements, she needs at least How many minutes does it take.
小华双休日想帮妈妈做下面的事情：用洗衣机洗衣服要用20分钟，扫地要用12分钟，擦家具要用10分钟，晾衣服要用5分钟，她经过合理安排，做这些事至少要花多少分钟．
<gadget id="calculator">12 + 10 + 5</gadget>
<output>27</output>

<result>27</result>