It takes Xiao Qing 3 minutes to recite the text, Xiao Li 2 minutes to recite the text, and Xiao Hua 5 minutes to recite the text. How can Teacher Zhang arrange so that the total time for the three of them to recite and wait is the least? How many minutes is the minimum? And explain how to calculate?
小青背诵课文需3分钟，小丽背诵课文需2分钟，小华背诵课文需5分钟，张老师怎样安排，才能使他们三人背诵及等候的时间总和最少？最少多少分钟？并说明怎样算的？
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

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

<gadget id="calculator">6 + 6 + 5</gadget>
<output>17</output>

<result>17</result>