6 people stand in a row to do exercises, Xiao Ming and Xiao Hong stand together, and Xiao Ming is behind Xiao Hong, how many different standing methods are there?
6个人站成一列做操，小明和小红站在一起，并且小明在小红的后面，共有多少种不同的站法．
<gadget id="calculator">5 * 4 * 3 * 2 * 1</gadget>
<output>120</output>

<result>120</result>