Donald Duck, Mickey Mouse and 5 Fuwa Beibei, Jingjing, Huanhuan, Yingying and Nini stand together. If Donald Duck and Mickey Mouse cannot be adjacent to each other, how many different ways of standing are there?
唐老鸭、米老鼠和5个福娃贝贝、晶晶、欢欢、迎迎、妮妮站在一块，如果唐老鸭和米老鼠不能相邻，那么一共有多少种不同的站法．
<gadget id="calculator">15 * 2 * 120</gadget>
<output>3_600</output>

<result>3_600</result>