<|system|>
Simplify $\sqrt{245}$.</s>.
<|user|>
Can you answer based on context?
<|assistant|>
We check what squares divide 245. None of the squares from $2^2$ to $6^2$ divides 245, but $7^2=49$ does. Dividing 245 by 49 gives 5, which has no square factors. So, $\sqrt{245}=\sqrt{49\cdot5}=7\sqrt{5}$.