There are 2*12=<<2*12=24>>24 apartments he needs keys for

So he needs 24*3=<<24*3=72>>72 keys

# Answer

72
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Tim owns rental properties.  He decides to replace all the locks and needs to get 3 keys per lock.  He owns two apartment complexes which each have 12 apartments.  How many keys does he need to make?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
72
Tim owns rental properties.  He decides to replace all the locks and needs to get 3 keys per lock.  He owns two apartment complexes which each have 12 apartments.  How many keys does he need to make?
train