I want to convert from coordinates to x:□y:△ of チャン chunk.

The following answers from Chiebukuro solved the problem.

Dear ara*******,

Let the number to the right of | be xx

chunk number=xx/16
x-coordinate in chunk = xx%16

I think it's OK to

^{--https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q13221504048}