people each carry a bucket to the same tap and line up to fetch water. The time required for each person to fill their respective buckets is: A takes 5 minutes, B takes 2 minutes, C takes 9 minutes, D takes 4 minutes, and E takes 7 minutes, if it takes at least how many minutes for everyone to fill a bucket of water.
5个人各提一只水桶到同一个自来水龙头前排队打水，每人装满各自水桶所需要时间为：甲要5分钟，乙需要2分钟，丙需要9分钟，丁需要4分钟，戊需要7分钟，如果让每人都装满一桶水花费时间最少多少分钟．
<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">10 + 16 + 15 + 14 + 9</gadget>
<output>64</output>

<result>64</result>