A certain travel agency organized several tour groups on "October", 412 people went to Shanghai, and 901 people went to Beijing. How many people are left to go to Shanghai and the same number of people go to Beijing?
某旅行社"十一"组织了几个旅行团，去上海的有412人，去北京的有901人，去上海的还差多少人就和去北京的同样多？
<gadget id="calculator">901 - 412</gadget>
<output>489</output>

<result>489</result>