Does anyone know of a way to split a decimal number????

I have found a way in a program I am writing to reference cells in a
second sheets by dividing the rown number in the current sheet by 5
i.e. if the row number in the current sheet is 1 then 1/5=0.2.
Therefore on the second sheet that item will be pasted on the first
row (indexed by 0) and two colums accross (indexed by 2).

So to come back to my question is there a way to get the right part of
the decimal and left part of the decimal. So that:

index accross = decimal value
index down = whole number


I have thought about the left function however this will go upto 1000
entries (therefore left,4 = 0.2) so this will not work :(

Thanks in advance,

Martin