Four people go to fetch water, and only one person can fetch water at a time, because the vessels they bring are different, and the time is different. Xiaohong takes 8 minutes, Xiaoli takes 6 minutes, Xiaoying takes 4 minutes, and Xiaohua takes 2 minutes. To make the total waiting time of the four people the shortest, what should be the order for the four people to fetch water? how long is it
四人去打水，而且每次只能一人打水，由于所带器皿不同，时间也就不同．小红用8分钟，小丽6分钟，小英4分钟，小华2分钟，要使四人等的总时间最短，四人打水顺序应怎样？是多长时间？
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">8 + 12 + 12 + 8</gadget>
<output>40</output>

<result>40</result>