I will work on the assumption that by "standard form" you mean a number in
the from 4567 (as I recall standard form is 4567; expanded form is 4×10^3 +
5×10^2 + 6×10 + 7)
So I will further conclude that you are getting scientific notation ( 4.567
×10^3) when you do not want it.
Solution: select the cell(s), use Format | Format Cells| specify Numbers and
set the number decimals as needed (zero for integers).
Caveat: Excel uses the IEEE method of storing numbers so you are limited to
15 digits of precision.
best wishes