Format of the square root

Questions
1

I would like help with a very trivial question:
When I make calculations, I get things like this: Sqrt[a] Sqrt[b] Sqrt[c].
I would like to get Sqrt[a b c].
Thank you very much

2

Simplify[Sqrt[a]*Sqrt[b]*Sqrt[c], Assumptions → Element[{a, b, c}, NonNegativeReals]]

(* Sqrt[a b c] *)
3

One way

Simplify[Sqrt[a] Sqrt[b] Sqrt[c], {a > 0, b > 0, c > 0}]
(* Sqrt[a b c] *)