Arrange 1 to 2015 from left to right, and click a "," every three numbers, such as 123, 456, 789, ..., then, what is the number before the 200th comma point.
把1到2015从左到右依次排列起来，每隔3个数字点一个"，"，如123，456，789，…，那么，第200个逗号点前的数字是多少．
<result>6</result>