If $a$ and $b$ are complex numbers such that $|a| = 6$ and $|b| = 4,$ then find $\left| \frac{a}{b} \right|.$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $a$ and $b$ are complex numbers such that $|a| = 6$ and $|b| = 4,$ then find $\left| \frac{a}{b} \right|.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{3}{2}
If $a$ and $b$ are complex numbers such that $|a| = 6$ and $|b| = 4,$ then find $\left| \frac{a}{b} \right|.$
train