the answer is not 16 and I don't know how it's not 16 and I need someone to explain it to me what the real answer is cuz I already know what the real answer is and I don't understand how it's the real answer

In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data
Scale factor: 1 : 8
Scale drawing:
A = 2 cm²
Object:
A = ?
Step 02:
A = 2 cm² * (8 / 1) = 16cm²