If an exercise asks for the number of informational rna nucleotides, does stop, nonsence codone (3 nucleotides) count?

Question

For example, if we have 300 amino acid in protein, do we count nucleotides of rna like 300×3+3 or just 300×3 and why so?? I dont get it, cause nonsence triplet is also a part of rna right?

Answer 1

I think it's just 300×3 because the STOP codon doesn't code for an amino acid.