people go to the delicious snack bar to eat breakfast, A eats buns (1 minute), B eats rice noodles (2 minutes), C eats noodles (4 minutes), D eats glutinous rice balls (5 minutes), how can the chef of the snack bar arrange for these 4 people Minimal waiting time?
有4个人到美味小吃店吃早点，甲吃包子(1分钟)乙吃米线(2分钟)丙吃面条(4分钟)丁吃汤圆(5分钟)，小吃店的师傅怎样安排才能让这4个人等待的时间最少？
<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">5 * 1</gadget>
<output>5</output>

<gadget id="calculator">4 + 6 + 8 + 5</gadget>
<output>23</output>

<result>23</result>