Multiply Numbers Increasingly

I dont decide how to write title?
And ExcelForum cant allow to attach Excel file, but PNG
Please look attached PNG,

Think that ColumA have number "1" (from A1 to A640 all cells are "1")
i wanna do this;
the first 8 will be 1,
the next 8 are 2,
the next 8 are 3,
the next 8 are 4,
....
....
it will continue increasingly like this (i did it in column B manually) (yellow field)
i know it is possible by formula?

best regards