Xiaojuan wrote a blackboard newspaper for her class, and one manuscript had 450 characters. If the blackboard newspaper can only write 9 lines, how many words can be written on average per line?
小娟为班上出黑板报，一篇稿件有450个字．如果黑板报只能写9行，平均每行可以写多少个字？
<gadget id="calculator">450 / 9</gadget>
<output>50</output>

<result>50</result>