The carpentry factory has been making a batch of chairs for 15 days, with an average of 148 chairs per day, and another 260 chairs can complete the task. How many chairs are there in total?
木器厂做一批椅子，已做了15天，平均每天做148把，再做260把就可以完成任务．这批椅子一共有多少把？
<result>2_460</result>