16
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The operation $\star$ is defined as $a \star b = a + \frac{a}{b}$. What is the value of $12 \star 3$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
16
The operation $\star$ is defined as $a \star b = a + \frac{a}{b}$. What is the value of $12 \star 3$?
train