From A, B, C, D, E5 people, select one section chief and two deputy section chiefs, how many different selection methods are there?
从A、B、C、D、E5人中，选一个科长，两个副科长，不同的选法共有多少种．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>