Sir while using SQLSERVER 2012 I have these codes

select top 1 reading,emp_start,emp_end  from bin1_final order by date

SELECT top 1 reading,(datediff(second,emp_start,emp_end)) as x, 3600 as y from bin1_final

SELECT top 1 (reading/(datediff(second,emp_start,emp_end))*3600) as y from bin1_final

The result looks like shown in attachment.

The correct answer is
50135/17808*3600= 10135
but is showing only 7200





Please help