On Sunday, Xiaohong helped her mother prepare for welcoming guests. She was responsible for boiling water, washing teacups, and mopping the floor. The time required: 10 minutes for boiling water, 5 minutes for washing teacups, and 9 minutes for mopping the floor. How many points does she need at least to finish these things.
周日，小红帮妈妈做迎客准备，她负责烧开水、洗茶杯、拖地，所需时间：烧开水10分、洗茶杯5分、拖地9分．她做完这些事最少需要多少分分．
<gadget id="calculator">10 + 4</gadget>
<output>14</output>

<result>14</result>