There are 168 students in the third grade of Experimental Primary School queuing up to do exercises. Every 8 people stand in a row. How many rows can they stand in?
实验小学三年级有168名学生排队做操，每8人站成一列，正好可以站多少列？
<gadget id="calculator">168 / 8</gadget>
<output>21</output>

<result>21</result>