Formatting cells to show precision as typed in (including trailing zeroes)

[santhire]

I need to type numbers in excel sometimes only 1 sometimes 1.00 or sometime 1.0000
so when I type the 1.0000 by default it takes 1 I need to format cell every time
is there anyway to solve if I type 1.0000 it should come 1.0000 if I enter 1.0 it should come 1.0

pls help