There are already good answeranswers available to your question, but Ifif you want to make this work with the same formula you had used initially:
=LEFT(A1,2)
Thenthen just prefix '
(Singlesingle quote before the number) See.
See the below screenshot for your reference
ie.eg., instead of just 0403
, make it as '0403
and thethen apply the same formula.
Screenshot for reference below
Add prefix before the number:
Works with the same formula: